Research on the economic policy effects of high-quality development of China's renewable energy Research on the economic effect of the development of digital finance Research on the industrial policy transformation of high-quality development of catering industry in China Research report on the high-quality development of China's regional economy 并列题名：Research on the economic effect of the development of digital finance Research on the high-quality development of Chinese sugar industry 并列题名：Research report on the high-quality development of China's regional economy Research on the micro-effect of macro-policy in the development of county economy