Chinese Vice Premier Wang Qishan has vowed to enhance trade cooperation with the U.S. state of Washington.

He told visiting Washington Governor Christine Gregoire in Beijing Thursday that China was ready to boost friendly ties with Washington State, and deepen cooperation in trade and investment to increase mutual understanding and trust.

Wang said a positive, cooperative and comprehensive China-U.S. relationship was in the fundamental interests of both peoples. Gregoire said Washington State wanted to strengthen substantial cooperation with China in areas such as aviation, information technology, agriculture and forestry.