Aerial photo taken on April 18, 2022 shows the scenery of Ra'og Lake in Qamdo, southwest China's Tibet Autonomous Region. (Xinhua/Jigme Dorje)

Aerial photo taken on April 24, 2022 shows the scenery of Ra'og Lake in Qamdo, southwest China's Tibet Autonomous Region. (Xinhua/Sun Fei)

Aerial photo taken on April 18, 2022 shows the scenery of Ra'og Lake in Qamdo, southwest China's Tibet Autonomous Region. (Xinhua/Jigme Dorje)

Aerial photo taken on April 24, 2022 shows the scenery of Ra'og Lake in Qamdo, southwest China's Tibet Autonomous Region. (Xinhua/Sun Fei)

Aerial photo taken on April 24, 2022 shows the scenery of Ra'og Lake in Qamdo, southwest China's Tibet Autonomous Region. (Xinhua/Sun Fei)

Aerial photo taken on April 24, 2022 shows the scenery of Ra'og Lake in Qamdo, southwest China's Tibet Autonomous Region. (Xinhua/Jigme Dorje)

Aerial photo taken on April 18, 2022 shows the scenery of Ra'og Lake in Qamdo, southwest China's Tibet Autonomous Region. (Xinhua/Sun Fei)

Aerial photo taken on April 18, 2022 shows the scenery of Ra'og Lake in Qamdo, southwest China's Tibet Autonomous Region. (Xinhua/Jigme Dorje)