The energy consumption per unit of GDP for China's major energy-intensive industries decreased by more than 20 percent from 2006 to 2010, said the National Bureau of Statistics (NBS).

The sectors include oil processing, coking and nuclear fuel processing, chemicals and chemical product manufacturing, non-metallic mineral product manufacturing, ferrous metal smelting and rolling, nonferrous metal smelting and rolling and electricity and heat producing and supplying.

The NBS attributed the rising energy efficiency to the growing investment in energy conservation, and to the upgrading of energy-conversation technologies in those sectors.