Study on the influence mechanism and promotion strategy of China's tourism industry efficiency Study on the evaluation and promotion strategy of county tourism competitiveness 并列题名：Study on the evaluation and promotion strategy of county tourism competitiveness Study on the influencing factors of China's energy efficiency Study on the influence mechanism of land finance on the ability of regional coordinated development Study on the basic characteristics and evolution law of China IPO market efficiency Study on the influence of soybean import on China's cropping industry Study on the influence mechanism and policies of entrepreneurial intentions among newly returnees Study on the potential and competitiveness of tourism industry in China Study on the internationalization strategy of China's vocational education