People take part in a ceremony marking the start of spring ploughing in Shannan, southwest China's Tibet Autonomous Region, March 16, 2021. (Xinhua/Jigme Dorje)

Aerial photo shows people taking part in a ceremony marking the start of spring ploughing in Shannan, southwest China's Tibet Autonomous Region, March 16, 2021. (Xinhua/Jigme Dorje)

A man takes part in a ceremony marking the start of spring ploughing in Shannan, southwest China's Tibet Autonomous Region, March 16, 2021. (Xinhua/Jigme Dorje)