Crystal ice floats in the upper stream of Heihe River in Qilian County, Haibei Tibetan autonomous prefecture, northwest China's Qinghai Province. (Photo: China News Service/Zhang Hongke)
Crystal ice floats in the upper stream of Heihe River in Qilian County, Haibei Tibetan autonomous prefecture, northwest China's Qinghai Province. (Photo: China News Service/Zhang Hongke)
Crystal ice floats in the upper stream of Heihe River in Qilian County, Haibei Tibetan autonomous prefecture, northwest China's Qinghai Province. (Photo: China News Service/Zhang Hongke)
Crystal ice floats in the upper stream of Heihe River in Qilian County, Haibei Tibetan autonomous prefecture, northwest China's Qinghai Province. (Photo: China News Service/Zhang Hongke)