Research on the development models and paths of China's county-level economy Research on the development mode and path of innovative city 并列题名：Research on the development mode and path of innovative city Research on the development and regulation of platform economy Research on the development of China's low-carbon economy Research on the development strategy of digital economy Research on the development of college sports economy research on the development path of Zhongguancun in the new era Re-probe into the development model of Japanese economy Research on regional development model of low-carbon economy