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Two students from northwest China's quake-hit Yushu Prefecture play piano at the youth activity center of Tianjin, north China, May 30, 2010. A total of 14 students from the quake-hit Yushu Prefecture of northwest China's Qinghai Province were invited to visit Tianjin to celebrate the International Children's Day. They will tour Tianjin and make friends with local families. (Xinhua/Liu Dongyue)

Children from northwest China's quake-hit Yushu Prefecture and children of Tianjin dance together at the youth activity center of Tianjin, north China, May 30, 2010. A total of 14 students from the quake-hit Yushu Prefecture of northwest China's Qinghai Province were invited to visit Tianjin to celebrate the International Children's Day. They will tour Tianjin and make friends with local families. (Xinhua/Liu Dongyue)