Photo taken on April 28, 2019 shows a woman working at Naicun Village in Gyirong County of Xigaze City, southwest China's Tibet Autonomous Region. (Xinhua/Jigme Dorje)

Photo taken on April 28, 2019 shows a yak resting at Gyironggou in Gyirong County of Xigaze City, southwest China's Tibet Autonomous Region. (Xinhua/Jigme Dorje)

Villagers walk in Gyirong County of Xigaze City, southwest China's Tibet Autonomous Region, April 28, 2019. (Xinhua/Jigme Dorje)

Photo taken on April 28, 2019 shows the scenery in Gyirong County of Xigaze City, southwest China's Tibet Autonomous Region. (Xinhua/Jigme Dorje)

Photo taken on April 28, 2019 shows plants in Gyirong County of Xigaze City, southwest China's Tibet Autonomous Region. (Xinhua/Jigme Dorje)

Photo taken on April 28, 2019 shows the scenery in Gyirong County of Xigaze City, southwest China's Tibet Autonomous Region. (Xinhua/Jigme Dorje)

Photo taken on April 28, 2019 shows the scenery in Gyirong County of Xigaze City, southwest China's Tibet Autonomous Region. (Xinhua/Jigme Dorje)