Study of the transformation of government's roles in the development of China's tourism industry A study of the transformation of government's roles in the development of China's tourism industry Study on the construction of credit environment and development of modern service industry Study on the technological innovation and development of China's textile industry A study on the value orientation of the development of China's cultural industry Study on fiscal and taxation policies for the development of cultural industry Study of transformation of socialization in the overseas Chinese farms in Huizhou Research on policy tools for sustainable development of China's tourism industry Research on transformation and sustainable development of China's country regional industry Study on optimal path of high quality development of Chinese medicine industry