The city of Changshu has strived for sustainable tourism development in recent years, according to the sixth session of the Annual Meeting of the United Nations World Tourism Organization Tourism Sustainable Development China Observation Station. Changshu is one of the 9 tourism sustainable development observatories established by the United Nations World Tourism Organization in China and also the only observation point in Jiangsu province. In recent years, Changshu has been closely focusing on the two themes of "ecological harmony" and "tourism enriching the people" by actively carrying out monitoring and publicity activities to provide the United Nations World Tourism Organization with a practical sample of strengthening ecological protection and improving residents ' happiness index in economically developed areas.