What does the stock energy sector include?

China is not dominated by energy, and the energy sector of China A shares has been relatively weak for a long time. I think the energy sector of A shares should include: 1. Coal stocks, including China Shenhua and Datong Coal Industry; 2. Oil and gas exploitation, China Petroleum and China Petrochemical; 3. Electric Power Unit, Changjiang Electric Power, China Guanghe. These stocks are basically blue-chip stocks, and the industry is mature and stable, but the development is slow and generally fluctuates little.