The content of this research focuses on investment among China, Japan and Korea, but among these investments, China is importer and Japan and Korea are exporters, so the paper make an analysis of the Japanese and Korean direct investment in China.

Within the past 10 years, the Japanese and Republic of Korean direct investment in China has promoted the bilateral trade between China and Japan, China and Republic of Korea, especially intra-industry and intra-firm trade.

This paper gives an overall analysis of the impacts of the impacts of WTO membership on China's environment according to the final commitments China made for WTO accession.

Among the research of economic cooperation among China, Japan and Republic of Korea, investigation of enterprise is an important part.

The paper reviews the origin and development process of the consumer creditworthiness investigation service in the United States, places emphasis on describing the operation model of the consumer creditworthiness investigation service companies in the States, and summarizes the features of the business operation of the consumer creditworthiness investigation service companies in the States.

The paper carries out empirical study into basic features of the structure of industries with foreign investment in China, its role and the mechanism determining the sectoral distribution of foreign investment.

Based on the results of the empirical analysis concerning the upgrading effect of foreign investment on industrial structure, the paper comes up with some policy thinking and proposals for strengthening orientation of industrial policy for foreign investment and promoting adjustment of industrial structure.

From the perspectives of forms of flow, geographical distribution, industrial composition and the relationship between host countries and trans-national companies, the paper reviews the main features of international flow of FDI since 1990s and explores the basic factors affecting international flow of FDI based on the views of relevant international investment theory and the results of empirical studies.