China Huaneng Group, the country's leading power provider, remained the world's second largest producer in terms of installed capacity at the end of 2012.

The group had a total installed capacity of 135.08 million kilowatts (kw) from all domestic and overseas power plants it controlled or owned at the end of 2012, up 7.7 percent, said Cao Peixi, President of Huaneng.

In 2012, Huaneng produced 608.7 billion kwh of electricity. Its full-year business revenue rose 3.5 percent year on year to 277.7 billion yuan ($44.08 billion).

Huaneng has focused on clean energy development, with the installed capacity of wind power and hydropower reaching 28.3 million kw at the end of 2012, or nearly 20 percent of the total installed capacity.