GONGBO'GYAMDA, April 10, 2016 (Xinhua) -- A tourist boat sails on the Basum Lake, 50 kilometers away from Gongbo'Gyamda of Nyingchi Prefecture, southwest China's Tibet Autonomous Region, April 9, 2016. Basum Lake was listed by the World Tourist Organization as a world tourist spot in the 1990s. (Xinhua/Zhang Rufeng)  

GONGBO'GYAMDA, April 10, 2016 (Xinhua) -- Fish swim in the Basum Lake, 50 kilometers away from Gongbo'Gyamda of Nyingchi Prefecture, southwest China's Tibet Autonomous Region, April 9, 2016. Basum Lake was listed by the World Tourist Organization as a world tourist spot in the 1990s. (Xinhua/Zhang Rufeng)

GONGBO'GYAMDA, April 10, 2016 (Xinhua) -- Tourists visit a temple on an island in the Basum Lake, 50 kilometers away from Gongbo'Gyamda of Nyingchi Prefecture, southwest China's Tibet Autonomous Region, April 9, 2016. Basum Lake was listed by the World Tourist Organization as a world tourist spot in the 1990s. (Xinhua/Zhang Rufeng)  

GONGBO'GYAMDA, April 10, 2016 (Xinhua) -- Tourists enjoy themselves on an island at the Basum Lake, 50 kilometers away from Gongbo'Gyamda of Nyingchi Prefecture, southwest China's Tibet Autonomous Region, April 9, 2016. Basum Lake was listed by the World Tourist Organization as a world tourist spot in the 1990s. (Xinhua/Zhang Rufeng)