Study on the impact of China's high speed railway on high-quality economic development Impacts of high-speed railway on China's economic development Research on the upgrading of industrial structure based on high-quality economic development based on the perspective of high-quality economic development Optimize the structure of the financial system to serve high-quality economic development Study on the characteristics and strategy of Yunnan's economic development Research on the mechanism of innovation elements allocation promoting high-quality economic development Government fiscal expenditure and high-quality economic development Regional experience in high-quality economic development Study on the labor shortage issue of Japanese economic development