The aim of this paper was to explore the acquisition, integration and use of new knowledge from multiple sources to promote R&D process of large commercial aircraft of China. Based on interviews of actors participated R&D of aircraft, it constructed a knowledge portal centered with knowledge repository of C919 program. The knowledge portal was analyzed in multiple subsystems comprised of layered structures. Each subsystem had a multi-layered knowledge integration architecture to dynamically

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... grate diverse knowledge within the Co-NPD network. Three types of interfaces and relative collaborative mechanisms across multi-levels were found in collaboration process. These collaborative mechanisms created norms to provide assurance that "proprietary knowledge" can be effectively protected while at the same time encourage valuable knowledge to be freely shared and utilized. Index Terms-Collaborative new product development, knowledge integration, network, collaborative mechanisms. Li Zhengfeng is a lecturer of management science in the School of Management at Northwestern Polytechnical University. He holds a BA in marketing, and a MS in enterprise management, and a PhD in management science and engineering from the Northwestern Polytechnical University, China. As a joint doctoral candidate, he studied and researched in University of Technology of Troyes of France for one year. His research interests include knowledge management, and technology innovation. He has more than 20 papers appeared in journals and conferences.