"China Paper" magazine interviewed Zhong Xiarui

On independent innovation of enterprises and industrial security issues

——"China Paper" magazine interviewed Mr. Zhong Xiarui, President of Changhua Paper Machine

Related links: http://www.cppi.cn/china/scene/c04/2007313112213.html

Zhong Xiarui, Bachelor of Engineering, Senior Engineer, Vice Chairman of Shandong Paper Industry Association and Shandong Light Industry Machinery Association. From 1988 to 1998, he served as technician, workshop director and deputy director of Shandong Second Light Industry Machinery Factory; in 1999, he served as factory director and party secretary; in 2001, he served as chairman and general manager of Shandong Changhua Paper Machinery Co., Ltd. .

Walking into the new factory area of ​​Changhua Paper Machinery, the brand-new factory scene can't help but make our eyes shine, which makes us sigh. The production area is located in rows of tall new-style factories with novel exterior decorations, presenting the scene of a modern enterprise.

The spacious and bright workshop, with advanced processing equipment, are arranged in an orderly manner, and the workers are busy working. Looking at the living area, there is a staff restaurant with a tall glass wall. It is majestic. There are rows of dining tables and chairs. Connected to it is a staff apartment temporarily used for office. . The external environment is being greened and beautified, an artificial lake for leisure is being filled with water, and the opposite office area is also under construction. When the new factory area is fully completed, this modern enterprise will be a scenic line standing majestically in Liaocheng, the water city in Jiangbei.

Interviewing Chang Hwa Chung has always been our long-standing plan. In 1999, the 35-year-old Zhong Xiarui was appointed when the company was in crisis; in 2001, the company was successfully restructured and embarked on a road of rapid development; in 2006, with the establishment of a new factory, Changhua with a new look showed its vitality. vitality. We came to Changhua with questions about successful corporate restructuring, independent innovation, industrial safety, and industrial development. Mr. Zhong gave him a warm reception and happily accepted our interview.

Reporter: Changhua Paper Machinery was restructured from Shandong No. 2 Light Industrial Machinery Factory, and has made important contributions to the development of the paper industry. After successfully restructured into a joint-stock enterprise in 2001, the enterprise has achieved new development. Please introduce Mr. Zhong about the enterprise. The restructuring situation and main experience.

Zhong Xia Rui: The predecessor of Shandong Changhua Paper Machinery Co., Ltd. is Shandong Second Light Industrial Machinery Factory. It is an old state-owned enterprise with a history of more than 40 years. It has made important contributions to the development of my country's paper industry. In 2001, it was successfully restructured into a private joint-stock enterprise, and all state-owned shares were withdrawn, forming a shareholding structure enterprise in which the management level and above hold the majority share, and the employees voluntarily participate in the shareholding.

After the restructuring, the enterprise has carried out all-round and in-depth reforms, activated the driving force for enterprise development, and established a modern enterprise management system. With multiple functions, one post has multiple positions, breaking the boundaries between cadres and workers in the appointment of cadres. In accordance with the principle of "promising, there is a position", open recruitment in the whole factory, more than 20 workers have taken up management positions, 10 of them Competing for jobs to middle-level leadership positions has created a group of professional, knowledgeable, and young high-quality cadres, which has greatly improved work efficiency. At present, the company has 619 employees, including 186 engineering and technical personnel, and the company has been recognized as a provincial enterprise technology center.

After the restructuring, the employees truly become the owners of the enterprise, and consciously integrate themselves with the enterprise, forming a sense of responsibility and mission of the masters, and exerting the initiative and enthusiasm of their work under the drive of a common value. Hua Company is full of vigor and vitality, with broad development prospects, and the company has embarked on the fast track of healthy and sustainable development.

Reporter: Since the reform and opening up, especially in the past 10 years, my country's paper industry has developed rapidly, and the equipment manufacturing industry of pulp and paper has also achieved a large-span development. The state proposed the localization of papermaking equipment and formulated relevant support policies. In this process, how has Changhua developed? What achievements and experiences have been obtained?

Zhong Xiarui: Since the beginning of the 21st century, China's paper industry has entered a period of rapid development. We have seized the opportunity, kept pace with the times, pioneered and innovated, digested and absorbed foreign advanced technology, improved the level of design process equipment and product quality, and adapted to the rapid market of papermaking machinery. The needs of development, the enterprise has been sustainable development. After several years of development, five joint workshops including casting, machining, riveting and welding, painting, and assembly have been built. Large-scale CNC boring and milling machines, horizontal machining centers, 12-meter planer, 9-meter planer and milling machine, 1200 Tons of CNC bending machine, CNC fine plasma cutting machine, automatic welding center, and CNC transformation of some key equipment, the company has a provincial-level enterprise technology center specializing in the research and development of paper machinery, and has been committed to technological progress and new product development. The research and development work mainly manufactures rotary wire, fourdrinier wire and stacked wire paper machines, with a total of 9 series and more than 100 specifications and varieties. In recent years, after technological transformation and product structure adjustment, the company has an annual processing and manufacturing capacity of 10,000 tons. The main products are the series of 2640-6000mm width, 250-1000m/min fourdrinier wire multi-cylinder cultural paper machine, and the width 2400-6000mm series. , Speed ​​100 ~ 650m/min cardboard machine, width 1760 ~ 2720mm series, speed 150 ~ 1000m/min tissue paper machine. In 2005, the output was 7,000 tons, the product sales income was 156.86 million yuan, and the profits and taxes were 18.83 million yuan.

By actively digesting and absorbing foreign advanced technology, high-tech products are increasing year by year. Many paper-making machines of different specifications developed and produced by our factory have won the provincial scientific and technological progress award. For example, the coated cardboard machine with an annual output of 150,000 tons and 300,000 tons, a kraft box board machine with an annual output of 150,000 tons and 200,000 tons, a corrugated base machine with an annual output of 100,000 tons and an annual output of 150,000 tons, and an annual output of 7 tons. 10,000 tons of newsprint machines and cultural paper machines. The above products all adopt the domestic advanced headbox technology, wire forming technology, pressing technology, drying technology and all-digital AC frequency conversion speed regulation system.

The vitality of an enterprise lies in technological progress, technological progress lies in talents, and future market competition is talent competition. Over the years, the company has attached great importance to the development and research of new products, and has paid attention to cultivating the professional skills of professional and technical personnel. It has created a team of workers who are familiar with the processing and manufacturing of paper-making machinery, and has created a group of engineering and technical personnel who have long been engaged in the design and development of paper-making machinery. . With the full operation of the new plant, Changhua's processing capacity and manufacturing level will be greatly improved. Focusing on the development goals of wide width, high speed, environmental protection and energy saving, the main products and key components developed recently are: large hydraulic dilution water headbox, controllable medium and high four-roll three-nip compound press, film transfer sizing machine, Automatic paper threading system, with an annual output of 100,000 to 150,000 tons of cultural paper machines, etc., long-term technological development focuses on dilution water-type multi-layer and single-layer headboxes, sandwich formers, crescent formers, shoe presses etc., so that the width of the paper machine can reach 6-8m, and the speed can reach 1000-1500m/min, so as to meet the needs of large and medium-sized papermaking enterprises.

Reporter: Since the reform and opening up, although my country's papermaking equipment manufacturing industry has achieved a large-span development, it is still far from the level of advanced foreign countries. Modern paper machines and key technical equipment still need to be introduced. Technological progress and modernization have played an important role - but the question now is: how can my country's equipment manufacturing industry narrow the gap with foreign advanced levels as soon as possible, and then catch up with foreign advanced levels and realize the localization of papermaking technology and equipment? Can you talk about your understanding and opinions on this issue?

Zhong Xiarui: In recent years, although domestic paper machines have made great progress in terms of width, speed and single machine output, there is still a big gap compared with the advanced level of foreign countries. At present, the level of domestic paper machines is width Below 6m, the vehicle speed is below 1000m/min, while the international advanced level is 10m in width, 2200m/min in vehicle speed, and the single-machine production capacity is as high as 2000t/d, with obvious technical advantages. It is highlighted in several key components of the paper machine, such as: high-speed large dilution water headbox, shoe press, calender, automatic control system of paper machine, etc.

The design and development of large-scale high-speed paper machine is not only a problem of mechanical design and manufacturing technology, but also the result of the combination of papermaking technology and data generated by experimental paper machines. The main factors restricting the width and high speed of the paper machine are as follows:

(1) The domestic technological development methods are backward, and basically remain in analogy, imitation and improvement. The modern wide-width high-speed paper machine is a relatively complex large-scale system that combines opto-mechanics, fluid mechanics and thermodynamics. Without the corresponding test methods and financial support, it is very difficult to develop a paper machine with the current international advanced level. .

(2) At present, the processing equipment of domestic paper machine manufacturers is also relatively backward, and the processing accuracy is not very high, which cannot meet the requirements of wide-format high-speed paper machines, and at the same time, domestic mechanical and electrical accessories can not meet the requirements.

(3) The design, manufacture and use of large-scale paper machines require the strong support and active cooperation of paper-making enterprises.

(4) Strong support from relevant national fiscal and taxation policies is required.

Although there is a relatively large technical gap at home and abroad, we also have comparative advantages. For example, the price of domestic paper machines is relatively low, and the investment of papermaking enterprises is small, which is suitable for national conditions. While actively introducing and absorbing foreign advanced technology, we should give full play to our own advantages and expand the national paper-making machinery and equipment manufacturing industry. Taking the road of joint manufacturing of large-scale paper machines at home and abroad is one direction, focusing on domestic and introducing foreign key parts and components to give full play to their respective advantages and serve the paper industry. For example, our SDZ1201-4800/700 coated white cardboard machine with an annual output of 300,000 tons for Ningxia Meili Paper Co., Ltd. adopts the method of introducing key foreign parts and components based on me. Through continuous cooperation with foreign countries, we can improve our own innovation ability after digestion and absorption, and narrow the gap with the international advanced level.

Reporter: Practice has proved that we cannot buy advanced "core" technologies from abroad, and we must rely on independent innovation to develop my country's papermaking equipment manufacturing industry. Regarding this issue, academician Chen Kefu and other experts have made strategic research on several issues of independent innovation in my country's pulp and paper equipment manufacturing industry, which were published in the sixth and seventh issues of this journal this year, and Mr. Zhong has studied it. This research report makes a comprehensive experience summary of past independent innovation, and puts forward guiding opinions for future independent innovation. Please combine this report and Changhua's situation to talk about how Changhua and the entire industry should promote independent innovation, narrow and catch up with foreign advanced levels.

Zhong Xiarui: Independent innovation has three meanings: first, original innovation, second, integrated innovation, and third, re-innovation on the basis of digesting and absorbing foreign advanced technology. Independent innovation is to combine original innovation, integrated innovation with introduction, digestion, absorption and re-innovation. While actively paying attention to and participating in original innovation and integrated innovation, attach great importance to the digestion, absorption and re-innovation of imported technology. Rely on the accumulation of independent brands to expand investment in technology research and development, and promote the improvement of independent innovation capabilities.

The main ways of enterprise technological innovation can be summarized as one analogy, two transplantation, three accumulation, and four integration. Analogy is not imitation, not plagiarism, analogy is borrowing, association, is similar to non-image. Technologies in all walks of life are developing rapidly, and technologies mature in other industries may not have been applied in this industry. Transplanting technologies from other industries into this industry is an innovation. The technology and products in this field need to be continuously improved, and accumulated over a long period of time, from small changes to large changes, quantitative changes to qualitative changes, to a certain extent, innovation will be formed. The direction of technology development, on the one hand, is more subdivided and more specialized, and on the other hand, it is necessary to integrate the subdivided fields and integrate unit technologies. Integration is an innovation, and a much-needed innovation today.

Efforts shall be made to form a technological innovation mechanism. Create a relaxed but innovative atmosphere and environment; secondly, innovation activities should be the convergence point of market pull and technology push; vigorously carry out mass technological innovation and technological improvement activities as the basis. The key to technological innovation is to have innovative talents. Such talents must have a certain knowledge structure, a broad knowledge base and deep professional knowledge.

The technological innovation activities of an enterprise are not aimed at the formation of independent intellectual property rights or the generation of knowledge, but to serve and obey its overall business goals, although in the process of independent innovation, it will definitely form independent intellectual property rights. . In the process of independent innovation, the first concept is confidence, can we go to independent innovation, can we form world-class technology and technological achievements? I think we can, we can do, this problem is not solved, all innovation Activities lack the most important support. The second concept is tenacity. Technological innovation is a arduous and long road. We dare not say that we will achieve great success on this road, but we can say with certainty that we will meet on this road. A lot of setbacks and difficulties, tenacity enables us to go a long way. The third concept is openness. The innovation activities of enterprises must not be closed to self-appreciation. We must integrate. We can integrate all external resources. We can cooperate with everyone, universities and research institutes. We We can cooperate with foreign companies, and we can even cooperate with our competitors.

The real main body of technological innovation is people. To solve people's problems, there are two conditions. The first is the system. The problem solved by the system is how to retain key innovative talents and how to attract the people you need. key talents to your business. The second is management. Management solves how to make such innovative talents into a harmonious and efficient organization to work effectively around a specific and clear innovation goal. Without the foundation of such a system and management, the technological innovation activities of enterprises will lack the basic soil, which is even more important than the technological innovation itself. For each enterprise, the resources it has are limited at a specific point in time. We must define our most effective and resource input and output goals within the scope of our resources. The formation of the independent innovation capability of an enterprise is a arduous and long process. I am willing to work with our peer enterprises to realize the qualitative transformation of China's paper machinery manufacturing industry from large to strong in such a process, to shrink and catch up. to the advanced level abroad.

Reporter: Academician Chen Kefu and other experts put forward in the strategic research report that there are three modes of independent innovation, mainly the first and the second. You also mentioned, that is, introduction, digestion, innovation after absorption, and integrated independent innovation . Regarding these two innovation models, please talk about how we should do it? In the past ten years, a lot of technical equipment has been introduced into the paper industry. What experience do we have in digesting, absorbing, re-innovating and integrating innovation? Especially What lessons and problems do you have? Changhua is a paper machine manufacturer. What are your plans for independent innovation? What problems exist? What are the requirements for the government and industry associations?

Zhong Xiarui: At present, independent innovation still has certain difficulties. Integrated innovation and re-innovation on the basis of digesting and absorbing foreign advanced technology should be said to be the main innovation form of our paper machinery manufacturing industry. As mentioned above, the innovation of enterprises must be

Subject to the business purpose of the enterprise, at this stage, most domestic papermaking machinery enterprises have the disadvantages of being large and complete or small and complete, resulting in similar products, excessive price competition, uneven quality and performance, meager profits, and insufficient R&D investment. , At present, the paper industry is in a period of high-grade and large-scale development. This is also a good time for the paper-making machinery industry to adjust the division of labor, and even restructure assets, and re-seek market positioning. Because there are not a few companies, it can even be said that most companies cannot meet the current requirements of paper manufacturers for mechanical products in terms of technology, quality, accuracy, debugging, and even processing cycles. They can accumulate a lot of experience in management and manufacturing, and obtain some useful knowledge. and information, and then innovate on the basis of digestion and absorption.

In recent years, Changhua Paper Machinery Co., Ltd. has continuously developed new products on the basis of digesting and absorbing foreign advanced technology. Annual output of 200,000 tons of box board machine, SDZ1103-4600/600 annual output of 120,000 tons of high-strength corrugated base paper machine, SDZ1001-3950/600 annual output of 70,000 tons of newsprint machine, SDZ1201-4800/700 annual output of 300,000 tons of coated white paper machine Card paper machine, SDZ805-3400/500 with an annual output of 150,000 tons of coated whiteboard paper machine, SDZ806-3150/500 with an annual output of 40,000 tons of newsprint machine, the development of the above products was successfully developed on the basis of absorbing foreign advanced technology .

In the process of enterprise innovation, I think there are mainly the following problems: (1) The design and development of large-scale high-speed paper machines is not only a problem of mechanical design and manufacturing technology, but a combination of papermaking theory and data generated by experimental paper machines As a result, any domestic paper machinery factory has no ability to invest in intermediate experiments, so it can only imitate and learn from it. (2) It is difficult for the paper-making machinery industry to attract a large number of outstanding talents, and the ability to independently develop products and innovate as well as the ability to digest and absorb similar foreign products is still relatively weak. (3) The new products of powerful domestic paper-making machinery factories need the strong support of paper-making enterprises in order to bring large paper machines to the market. (4) Although many paper-making production lines with international leading level have been introduced in China, the paper-making machinery factory has no chance to digest and absorb, or even to see it. Therefore, enterprises hope that government departments and industry associations can come forward to coordinate, digest and absorb the existing advanced technologies suitable for national conditions as much as possible, and launch large-scale modern paper machines with a width of more than 6m and a speed of more than 1000m/min as soon as possible to better serve the paper industry. .

Reporter: There is a big gap between our pulp and paper equipment manufacturing industry and the advanced level of foreign countries. It is absolutely necessary to cooperate with foreign companies in some form. However, some enterprises have lost confidence in taking the road of independent innovation, shrinking and catching up with the advanced level of foreign countries, which has led to the integration and merger of foreign enterprises. So, please, Mr. Zhong, do you think there is a problem of industrial safety in my country's papermaking equipment manufacturing industry? There are basically two views on this issue both inside and outside the industry: First, it is considered a crisis. Enterprises with certain advantages will be eaten by foreign capital, and enterprises lacking advantages will be eliminated in the competition. In the future, China's paper industry will completely rely on foreign technology and equipment, which will also lead to the industrial safety of the paper industry. The second is that there is no crisis. Because China's paper industry is divided into different levels, foreign technical equipment serves China's large modern enterprises, while domestic technical equipment serves small and medium-sized enterprises. How did you meet Mr. Zhong?

Zhong Xiarui: Regarding the issue of industrial security, there has been a lot of talk in the media recently. I personally think that industrial security means that under the conditions of opening to the outside world and international competition, the country's important industries can maintain their relative advantages. Subject to the influence of multinational capital, so as to maximize the interests of the country. The prominent problems faced by my country's industrial security are mainly in the weak capability of independent innovation in technology-intensive industries, and the core technology depends on transnational requirements. Therefore: (1) Enterprises with good market reputation and strong technical and management strength can seek cooperation and learn from each other's strengths, so as to concentrate manpower and material resources for market development and technological innovation. ( 2 ) Can cooperate with foreign manufacturers in projects to improve the level of the whole machine, and improve the technical level and innovation ability of enterprises through cooperation. ( 3 ) Seeking to cooperate with large international companies to support some of them, and cooperate with large companies through Changhua's own large wide-width dryer (semi-finished products), the company is in a disadvantaged position in the international division of labor system. Compared with my country's pulp and paper equipment manufacturing industry, there is no industrial safety at all. In recent years, the market share of pulp and paper equipment has been dominated by foreign investors in terms of paper production and sales, and this trend is continuing and cannot be reversed in a short time. At present, the technical level of China's pulp and paper equipment industry is still far from the international advanced level, and it is impossible to compete on one platform, and the market objects it serves are different. Therefore, the main way to enhance industrial security is to enhance its own innovation capabilities.

Reporter: For the industrial safety of my country's paper industry and paper equipment manufacturing industry, the seventh and ninth issues of this journal have published and reprinted relevant articles respectively. The purpose is to sound the alarm and attract the attention of enterprises and entrepreneurs. Mr. Zhong, please talk about how to cooperate with foreign-funded enterprises on the issue of independent innovation and avoid risks in combination with Changhua's plan?

Zhong Xiarui: Independent innovation does not mean self-innovation, nor does it mean closed innovation. We propose to insist on independent innovation, not to exclude technology introduction, but to take learning and re-innovation based on technology introduction as an important way to enhance the ability of independent innovation. As a developing country, making full use of international advanced scientific and technological achievements and insisting on re-innovating on the basis of digesting and absorbing foreign advanced technology will become a very important basic approach for my country's independent innovation. Under certain conditions, technology can be introduced, but technological innovation capabilities cannot be directly obtained through introduction, and key technologies cannot be bought. Technological innovation capabilities are endogenous and need to be acquired through organized learning and product development practices. The lesson of my country's technology introduction is that it did not insist on digesting and absorbing the imported technology, and took a vicious circle of "introduction, backwardness, re-introduction, and backwardness". The ratio of the cost of imported technology to the cost of digestion and absorption in Japan and South Korea is 1:5 and 1:8 respectively, while the ratio in my country is 1:0.15, resulting in repeated introduction of high costs. To change this passive situation, the state needs to formulate corresponding support policies for the introduction of technology and digestion and absorption, and formulate supporting regulations to strengthen the norms for the digestion, absorption and re-innovation of imported technology. Avoid dependence on the repeated introduction of international technology.

Reporter: Mr. Zhong believes that my country's papermaking equipment manufacturing industry has no industrial security at all. He pointed out that the outstanding problems of industrial security are that the ability of independent innovation is not strong, the core technology depends on multinational companies, and it is in a disadvantageous position in the international division of labor system. It was amazing and touched us deeply. Mr. Zhong also talked about the ways of independent innovation of enterprises with confidence. It can be summarized as one analogy, two transplantation, three accumulation, and four integration. At the same time, he also pointed out that three concepts should be established, one is confidence, the other is tenacity, and the third is openness, which makes people see hope. We would also like to raise a question: Many major research projects in our country have been successfully carried out by organizing different departments, industries and personnel to cooperate in tackling key problems. We are a socialist market economy. Even if the papermaking equipment manufacturing industry is a small industry, there are conditions for cross-department and cross-industry. Form a community of interests with the same goals, and cooperate in independent innovation to tackle key problems. The processing and manufacturing of key and fine components can also be divided and cooperated to give full play to their respective advantages and form new overall advantages. Enterprises are not only open to external cooperation, but also open to internal cooperation. Do you think this method is feasible and can it speed up the pace of independent innovation in the papermaking equipment manufacturing industry?

Zhong Xia Rui: It should be completely feasible. However, government departments and industry associations are required to organize and coordinate, and introduce relevant policy measures. As mentioned above, how to digest, absorb and re-innovate together with paper-making equipment manufacturers when paper-making enterprises introduce foreign advanced technology and equipment. Another example is that our papermaking equipment manufacturing enterprises have poor processing capabilities, but it is known that the processing capabilities and processing accuracy of large domestic machine tool factories are even stronger than those of well-known foreign papermaking equipment enterprises. According to the principles of the socialist market economy, everyone forms a community of interests with the same goals, which can form new advantages and new productive forces. It is necessary to promote the formation of an independent innovation system for production, education and research, including supporting cooperation between enterprises and complementing each other's advantages. Industry associations focus on going deep into the enterprise, listening to the voice of the enterprise, understanding the needs of the enterprise, reporting the situation to the government department in a timely manner, and putting forward opinions and suggestions on policy measures. The state has promptly introduced industrial policies to encourage independent innovation, restrict repeated introductions, and encourage the use of domestic equipment. Government departments, industries and enterprises, whether large or small, perform their respective responsibilities and form a combined force to promote and implement independent innovation vertically and horizontally. We can narrow the gap with foreign advanced levels as soon as possible, and then catch up with foreign advanced levels just around the corner. Who would have thought that China's paper industry would reach today's level 10 years ago! We fully believe that China's paper equipment manufacturing industry will also create miracles in independent innovation.

Reporter: Finally, Mr. Zhong, would you like to talk about Changhua's near-term development plan?

Zhong Xiarui: The guiding ideology of the enterprise's technological innovation and development planning is: based on the sustainable development needs of the enterprise, strive to track the development direction of the international paper machinery industry, and develop papermaking technology and equipment with large market demand, high technology content, and domestic advanced level. Adhere to market-oriented, optimize product structure, improve technical level and product quality, reduce costs, and serve the development and growth of enterprises.

Main goals: To carry out high-tech research on pulp and papermaking equipment and processes, to speed up the pace of new product development and the replacement of old products, and to narrow the gap with the international advanced level as soon as possible; through project cooperation with foreign companies and the introduction of advanced technology, the The large-scale paper machine with wide width, high speed, low consumption and environmental protection at the international level has made the enterprise become the main production base for replacing imported pulp and paper equipment in my country.

Recent development plan:

(1) Improve the series paper machines with an annual output of 100,000 tons of high-strength corrugated base paper represented by 4400/600, a series of paper machines with an annual output of 200,000 tons represented by 4400/600, and a series of paper machines with an annual output of 30 tons represented by 4800/700 10,000 tons of high-grade coated white cardboard series paper machine. The above three products are new products developed by our company in recent years, with large output, high speed and low consumption, and the technical level of the whole machine is leading domestically.

(2) Products and key components that need to be developed in the near future: ① Development and design of dilution water headbox; ② Research and development of film transfer sizing machine; ③ Research and development of automatic control system of paper machine; ④ Research and development of automatic paper threading system ;⑤The annual output of 100,000 tons of high-quality cultural paper machine;

Source: Zhonghua Paper Author: Ren Yongsen, Zhao Zhendong, Zhang Hongcheng, Yang Chenming [2007/03/03]