People participate in a tug-of-war game under the water during a underwater sports meeting held in the Tianjin Haichang Polar Ocean World in Tianjin, north China, July 21, 2011. The underwater sports meeting kicked off here on Thursday. (Xinhua/Zhou Wei)
People participate in an underwater sports meeting held in the Tianjin Haichang Polar Ocean World in Tianjin, north China, July 21, 2011. The underwater sports meeting kicked off here on Thursday. (Xinhua/Zhou Wei)
