A herd of cattle graze on the Ar Horqin grassland in Chifeng, north China's Inner Mongolia Autonomous Region, June 2, 2020. (Xinhua/Liu Lei)

A herd of cattle graze on the Ar Horqin grassland in Chifeng, north China's Inner Mongolia Autonomous Region, June 2, 2020. (Xinhua/Liu Lei)

A herd of sheep graze on the Ar Horqin grassland in Chifeng, north China's Inner Mongolia Autonomous Region, June 3, 2020. (Xinhua/Liu Lei)

Herds of sheep and cattle graze on the Ar Horqin grassland in Chifeng, north China's Inner Mongolia Autonomous Region, June 2, 2020. (Xinhua/Liu Lei)

Photo shows a rainbow over the Ar Horqin grassland in Chifeng, north China's Inner Mongolia Autonomous Region, June 3, 2020. (Xinhua/Liu Lei)

Photo shows a rainbow over the Ar Horqin grassland in Chifeng, north China's Inner Mongolia Autonomous Region, June 3, 2020. (Xinhua/Liu Lei)