Photo taken on April 6, 2018 shows flowers bloom along the Nyang River in Nyingchi, southwest China's Tibet Autonomous Region. [Photo/Xinhua]

Photo taken on March 29, 2018 shows flowers bloom in Lhasa, capital of southwest China's Tibet Autonomous Region. [Photo/Xinhua]

Photo taken on April 6, 2018 shows flowers bloom at the foot of Mount Namjagbarwa in Nyingchi, southwest China's Tibet Autonomous Region. [Photo/Xinhua]