As the leader of the National Key Technology
R&D Program of China in the region of the
Songnen and
Sanjiang Plains, Liu has presided over many major programs and projects, such as the survey of agricultural resources, the ecological engineering of wetlands, the soil and water control of low-lying farmland, the sustainable development of regional agriculture, and so on. Also, as the director of the experts committee of wetland survey in China, he took charge of the project "Survey and Classification of Lakes and Marshes in China". Liu initiated the model of Complex Ecological Agriculture Project of Paddy-Reed-Fish, blazed a way in the located ecological research on marsh, and accomplished a great deal in the harness of low lying farmland, regional ecological conservation and agricultural sustainable development. ==Works and awards==