This stitched photo taken on April 5, 2024 shows scenery of the Yamzbog Yumco Lake in southwest China's Xizang Autonomous Region. (Xinhua/Jiang Fan)

Tourists feed brown-headed gulls by the Yamzbog Yumco Lake in southwest China's Xizang Autonomous Region, April 5, 2024. (Xinhua/Jiang Fan)

A tourist poses for a photo with the Yamzbog Yumco Lake in the background in southwest China's Xizang Autonomous Region, April 5, 2024. (Xinhua/Jiang Fan)

Tourists feed brown-headed gulls by the Yamzbog Yumco Lake in southwest China's Xizang Autonomous Region, April 5, 2024. (Xinhua/Zhang Rufeng)

A tourist feeds brown-headed gulls by the Yamzbog Yumco Lake in southwest China's Xizang Autonomous Region, April 5, 2024. (Xinhua/Jiang Fan)

A tourist rides a horse by the Yamzbog Yumco Lake in southwest China's Xizang Autonomous Region, April 5, 2024. (Xinhua/Zhang Rufeng)