Now, the worldwide resources sharing develops rapidly with the growth of development of modern information technology and the extensive application of networks. In China, university libraries, the number of which has come to 1,100 at present, are working together to establish nationwide networks for resources sharing. Up to date, more than half of universities and colleges have established their own networks at campus, some of them have already linked with Internet, the world largest network today. This provide better conditions for co-operative establishing networks for resources sharing among them both regionally and nationally. Furthermore, the collections not only in printed form but also in electronic forms provide rich information for the networks, which has been growing rapidly year after year. Besides these, a large team of professionals has grown up in recent years, at present time, the number of librarians working in China university libraries has come to 40,000, near 10% of them are highly qualified professionals, who make great contribution to the advancement for promoting information and document resources sharing and the information service, and play an important role in scientific research and higher education in the country. The development of networks for resources sharing in China university libraries will certainly promote the nation's economic construction, education, science and culture, and make great contribution to the worldwide resources sharing.

Being a developing trend in library and information cause, networks for resources sharing is a combination in the concept both of resources sharing and network, which is different from library automation network and computer search network. It is a high-level combination, based on computer network, both of library automation technology and librarianship which adopts modern technology with computer technology as its core in document arrangement, storage, retrieval and delivery, utilizes computer network in supporting information exchange and communication among libraries and information institutions, institutions and information resources, institutions and users, as well as information resources and users.

As one of the six major document resource systems in China, the establishment of university library networks for information resources sharing has undergone a long way, which can be divided into three stages.

• A contingent of automation was recruited in a great number of university libraries where computers for pilot work were equipped.
• Various training programs for computer application were set up and local associations of university libraries were established, which encouraged activities in MARC coordination groups, and in turn, enhanced the research and utility of US MARC.
• Some university libraries began to develop experimental systems, such as Bibliographical Retrieval Systems for European Languages, Periodical Management Systems, Bar Code Circulation Systems and so on.

• Some applicable systems developed began to be put into operation, such as Database of China University Science Journal Abstracts, Laser Bar Code Computerized Circulation System for Chinese Books, Bibliographical Control System, Library Integrated System and Computerized Union Catalog System, etc.
• Some advanced equipments were introduced in some university libraries, such as disk, disk-driving machines, laser bar code reading machines for further developed and better service.
• Besides establishment of individual database, some university libraries participated in the Chinese Bibliographical Retrospective Database Research. Cooperation in establishing database in some local regions began to increase. In order to improve quality, great attention has been paid in standardization, integration, exploitation of practical systems and improvement of available integrated systems, enhancement of the building up of databases, and the encouragement of the research of soft science of high levels
• In some universities with better conditions, where information networks were established in their campus, international terminals were set up linked with some major information network systems of the world, such as Internet.

• Building up document and information service network.
• Construction and digitalization of document and information resources.
• Establishment of management system and operation mechanism for CALIS, which fit for the real condition of China's universities and colleges.

All above laid a good foundation for establishment of networks for resources sharing in China Universities.

As mentioned above, the networks for information resources sharing is a high-level combination both of library automation technology and librarianship, for many years, lots of work and preparation have been done on document resources construction in China university libraries.

For further development on networks for resources sharing in China university libraries, the following efforts should be made greatly..

Compared with world advanced library automation systems, the following should be reconsidered in opening up China's own integrated library automation systems.

Advanced management thoughts and models should be fully embodied in the systems.

The function of the system such as on-line acquisition, joint cataloging, on-line public searching, making appointments with users for need documents, delivering full-text information on networks, etc. need to be enhanced through adaptation of TCP/IP communicating protocol. Besides the basic function on Internet, WWW Server and CGI as well as Z39.50 standard interface are major elements to be supplied.

In this case the system should be designed and manufactured into a large integrated searching system and resources sharing system. The consideration for this is good for reducing repeat work and increasing transparency for documents and information. For instance, the cataloging subsystem should have interfaces linking with other subsystems in the integrated system, with which, as the acquisition file is created in MARC format strictly, other subsystem such as cataloging, OPAC etc. can share its data resources, and as soon as the data in cataloging subsystem is renewed, what in OPAC subsystem will be renewed automatically at once. All above not only benefit for library's management, but also help users to better understand the library's information.

Public searching subsystem is an appearance of software system, which faces the users directly. So, in designing and making the OPAC, the surface of which should have both pictures and texts, fit the users' searching practices and have features of various functions, such as easy operation, clear terminology, and both with basic and high-level searching performance. For reinforcing the searching function of OPAC, multi-searching points should be set up for bibliographic file search. Authorized files should be established for controlling the consistence of the bibliographic data and the completeness of searching result. Also, in circulation subsystem, according to requirements, policies set up for the system should be of flexibility to show the users' circulation status.

Statistical work is very important in library. The policy-decision of library is mainly based on analysis of statistic data. So, in system designing, statistic function should be strengthened according to requirements which should include data statistics, collection statistics, statistics on increase of stock, borrowing and returning of books and periodicals, document utilization, quality control, as well as users' status and work load for librarians, etc.

Database construction mainly includes two types: self-establishing or importing from foreign countries.

For many years, a large quantity of document resources has been accumulated in China university libraries, which is still expanding each year to date. How to bring these resources into full play and to be better used by every user is a main task for China university libraries. The best way to do is to build up complete bibliographic databases and document databases as quickly as possible, which should include:

• Union catalog databases for books and periodicals both in Chinese and foreign languages.
• Document databases with characteristics of China universities and colleges.
• Document databases on specific topics needed for the major disciplines of universities.

Those databases can be established jointly through division of labor on major disciplines or subjects in each university or college to avoid repetition.

This is another way for speeding up the building of databases. Since there are a large number of document resources abroad, and with the development of networks, a large volume of electronic documents appear on networks, for effectively utilizing these resources, importing the valuable databases from foreign countries is urgently needed.

Importing databases should include introducing medium and service. According to requirements and probability, coordination and planning are needed to avoid unnecessary repetition and interior competition. As for the type of importing databases, more attention should be paid on the balance of types as well as the acquirement for original documents.

The following three are major types for importing:

• Abstracts databases
• Index databases
• Full-text databases

In accordance with the requirement on the development of networks for resources sharing in China higher education, professionals in building up such projects should be of many fine qualities.

As for the ways for training qualified and talented personnel’s, the following measures can be considered:

• To establish a number of training bases for systematically training both on professional knowledge and skills.
• To encourage in-service study for academic degree.
• To organize professionals going abroad on a tour of investigation and advanced studies for training high ranking managers and heads on subjects.
• To invite foreign exports for academic exchanging or giving lectures.
• To hold meetings for academic and technological discussions and exchanges.

In brief, great achievements have been gained in the development of networks for information resources sharing in China universities and colleges, which will surely promote China's economic, educational and cultural construction. However, toward worldwide information resources sharing, we still have a long way to go. Let's unite and work hard together for the bright future.