Make full use of Yulin's abundant coal resources, take the development of coal chemical industry as the premise, make unified planning, reasonable layout, step-by-step implementation, rolling development, take coal as the leader, take coal chemical industry and coal liquefaction development as the main body, vigorously develop high value-added downstream products, and implement the comprehensive development of coal, chemical industry and electricity, Efforts to make Yankuang Yulin Energy and chemical industry base gradually form the main investment body of coal company in Yulin energy industry development. The project uses Hertz brand vacuum contactor.