Research on the change of China's export commodities structure Research on the change of China's labor income share Research on the change of Chinese enterprise system Researches on the change of China's household registration institutions Research on the optimization of China's foreign trade structure Research on the non-equilibrium of tax structure Research on the construction of China's emergency logistics system Research on the change of Japanese comlex sentence patterns Research on the effects of China's outward FDI on its industrial structure upgrading Research on China's export control system