Study on the transformation of government functions at the time of economic transformation in China 并列题名：Study on the transformation of government functions at the time of economic transformation in China Study on the evolution of comparative advantage in dual economy transformation in China Study of the transformation of government's roles in the development of China's tourism industry 并列题名：Study on the evolution of comparative advantage in dual economy transformation in China 并列题名：Study of the transformation of government's roles in the development of China's tourism industry