General Motors Corp. (GM) aims to double its annual sales in China to 2 million units in five years, China-based spokeswoman Sophia Luan said Thursday.

The U.S. auto maker will expand its production capacity in China as well as its product portfolio, Luan said. It plans to add 30 new models in China over the next five years, she said.

"We have a plan in hand," she said, but declined to elaborate.

GM's 2008 sales in China rose 6% to 1,094,561 units.

-By Patricia Jiayi Ho, Dow Jones Newswires; (8610) 6588 5848; patricia.ho@dowjones.com