Cows drink water at a breeding base of the Musha Ranch in Zhongwei, northwest China's Ningxia Hui Autonomous Region, Sept. 14, 2020. (Xinhua/Wang Peng)

Cows rest at a breeding house covered with sand at the Musha Ranch in Zhongwei, northwest China's Ningxia Hui Autonomous Region, Sept. 8, 2020. (Xinhua/Wang Peng)

Calves eat food at the calf breeding area of the Musha Ranch in Zhongwei, northwest China's Ningxia Hui Autonomous Region, Sept. 14, 2020. (Xinhua/Wang Peng)

A technician take samples of cow dung to monitor their health conditions at the Musha Ranch in Zhongwei, northwest China's Ningxia Hui Autonomous Region, Sept. 14, 2020. (Xinhua/Wang Peng)

Aerial photo taken on Sept. 8, 2020 shows the cow breeding base at the Musha Ranch in Zhongwei, northwest China's Ningxia Hui Autonomous Region. (Xinhua/Wang Peng)

Aerial photo taken on Sept. 8, 2020 shows the cow breeding base at the Musha Ranch in Zhongwei, northwest China's Ningxia Hui Autonomous Region. (Xinhua/Wang Peng)