China Academic Library & Information System (CALIS) is the world's largest university library consortium, which is responsible for resource coordination and joint construction, document information sharing services, and staff training, application system construction, etc. It uses cloud computing (CC) technology to build a platform for cloud services and sharing, which is a model for the development of China's university library alliances (CULA) in the past 30 years, and has played an important

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... role in promoting the CULA development, which has independently designed and developed an online cooperative cataloging system and an online public retrieval (OPAC) system for the retrieval of the joint catalogue of Chinese and foreign books and periodicals. This article mainly adopts the method of case analysis to analyze the development process, organizational structure, operation mode, and development trend of CALIS, with the purpose of revealing the general laws of the CULA construction.