Research on the development of modern industrial system in Yangtze River economic belt 并列题名：Research on the development of modern industrial system in Yangtze River economic belt Research on the linkage development of urban agglomeration in the Yangtze River economic belt Report on the development of the Pearl River-Xijiang River economic belt research on development of cultural industries in the Yangtze River Delta Research on integrated development and green exploitation of Yangtze River economic belt Research on the development mechanism of industrial cluster in tourism and leisure belt 并列题名：Study on the development index of economic and social integration in the Yangtze River Economic Belt Study on the development index of economic and social integration in the Yangtze River Economic Belt 并列题名：Report on the development of the Pearl River-Xijiang River economic belt