Electricity output is probably the most reliable guide to China's underlying economic performance, so the growing demand for power is a very important indicator.
That being said, cheap Chinese coal stocks could be a strong medium-term play. I don't see any other form of energy fulfilling China's growing energy needs, at least until (or if) several more nuclear plants come online.
Makes sense given that long lead time required for new nuclear power generations sources to come online. Although, the Aussie thermal coal market still showing no signs of recovery http://www.indexmundi.com/commodities/?commodity=coal-australian&months=60