Construction principle of sandstorm source control project in Beijing and Tianjin

First, adhere to the principle of giving priority to prevention and protection; Second, adhere to the principles of overall planning, comprehensive management, local conditions and classified guidance; Third, adhere to the principle of combining ecological priority, ecological benefits, economic benefits and social benefits; Fourth, adhere to the principle of combining policy guidance with farmers' voluntary participation; The fifth is to adhere to the principle of joint work of the state, the collective and the individual.