Buddhist mantras seen on frozen Tongtian River in Qinghai (4/9)

Buddhist mantras are seen on the icy surface of Tongtian River at Yushu Tibetan autonomous prefecture in northwest China's Qinghai Province on Jan. 20, 2014. Local Tibetan people write the Six Syllable Prayer with sands on the icy surface of the river, which is the so-called "sutra bridge". Lines of Tibetan letters are drawn on the ice first; then people carry sands and spread them to fill all the letters. [Photo/China News Service]