Perennial Energy Holdings Limited, an investment holding company, engages in the exploration and mining of coking coal in the People's Republic of China. The company offers clean, middling, sludge, and raw coal, as well as coalbed methane gas. It also operates a coal refinery. The company operates three underground coal mines, comprising Hongguo Coal Mine, Baogushan Coal Mine, and Xiejiahegou Coal Mine, which are located in