ANNAPOLIS, Maryland: China and United States will hold talks on an investment treaty that could greatly widen opportunities for American companies in China.

The announcement came as the two countries wrapped up the fourth Strategic Economic Dialogue (SED), which began on the US Naval Academy campus in Annapolis on Tuesday.

Vice-Premier Wang Qishan and US Treasury Secretary Henry Paulson co-chaired the meeting as special representatives of President Hu Jintao and US President George W. Bush.