National and ministerial level. According to official website's inquiry, Shenzhen Gas Group Company, a large state-owned listed company, is mainly engaged in urban gas operation, with the coordinated development of upstream resources, comprehensive energy and intelligent services. This is a capable company deployed by the state and affiliated to the national ministerial group. Shenzhen Gas is the pioneer of intelligent operation in domestic gas industry, and its safe operation and quality service are at the leading level in the industry.