China's retired NBA basketball star Yao Ming high fives a boy as Chicago Bulls' center Joakim Noah (not pictured) and he teach basketball to children at a primary school in a migrant workers' village on the outskirts of Beijing, June 30, 2013. The visit was organized as a part of a charity exhibition basketball game to be held on July 1 to raise funds for a project from Yao's charity foundation. [Photo/Agencies]

A fish boat moves in the water with blue-green algae at the Chaohu Lake in east China's Anhui province, June 30, 2013. Due to heat and sunshine, a large bloom of blue-green algae expanded at the Chaohu Lake, turning part of the lake color into green. [Photo/Xinhua]