Chinese stocks posted biggest daily gain in two weeks Wednesday following market rumor about a strong export growth in May, which had eased market concerns over weakening economic growth.

The Shanghai Composite Index closed at 2,583.87 points, up 69.92 points, or 2.78 percent from the previous close.

The Shenzhen Component Index ended at 10,346.27 points, up 307.49 points, or 3.06 percent, from the previous close.

Total turnover expanded to 196.07 billion yuan (28.71 billion U.S. dollars) from 142.39 billion yuan on the previous trading day.

Gainers outnumbered losers by 869 to 22 in Shanghai and 868 to 93 in Shenzhen.