Nowadays, in China, there exist obvious regional economic differences. However, narrowing such differences involves solving the problem of regional innovation differences. Furthermore, regional innovation capability disparity is an important factor in explaining the imbalances between regional economic development and international economic development. Hence, the study first adopts the Theil index decomposition formula to analyze innovation difference and evolution law in China and its four regions during 1998-2013 from the perspective of high-tech industries. The study explains the reasons for the differences in regional innovation capability on the spatial and factorial levels. The study then analyzes the convergence of innovation capability on different space-scales by applying the spatial panel of the β convergence model. The analyses show that 2007 was the important inflection point in China's regional innovation capability difference pattern; since then, the convergence speed of regional innovation capability has accelerated significantly.

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Product development is the most knowledge-intensive segment in enterprises; therefore knowledge management will have a direct bearing on the efficiency of product development. Taking the entire process of product development as research object, this paper divide product development process into three cycle stages which are product conceived, product design and product implementation. According to characters of the flow of knowledge in these stages, we put forward to implement knowledge management audit strategy, knowledge map strategy and knowledge patent strategy at each stage that enable enterprises to develop high-quality products quickly and accurately to meet market needs and obtain higher return on knowledge. Keywords-product development; knowledge management; knowledge map; knowledge patentI.