A staff walks at an ecological ranch in Sujiwan Village of Haibei Tibetan Autonomous Prefecture, northwest China's Qinghai Province, June 20, 2019. The plateau climate helps attract tourists to visit the ranches during summer time when the weather here is agreeable. (Photos: Xinhua)

Aerial photo taken on June 21, 2019 shows an ecological ranch in Sujiwan Village of Haibei Tibetan Autonomous Prefecture, northwest China's Qinghai Province. The plateau climate helps attract tourists to visit the ranches during summer time when the weather here is agreeable.

A girl cleans a tent at an ecological ranch in Sujiwan Village of Haibei Tibetan Autonomous Prefecture, northwest China's Qinghai Province, June 20, 2019. The plateau climate helps attract tourists to visit the ranches during summer time when the weather here is agreeable.

A girl serves meal at an ecological ranch in Sujiwan Village of Haibei Tibetan Autonomous Prefecture, northwest China's Qinghai Province, June 20, 2019. The plateau climate helps attract tourists to visit the ranches during summer time when the weather here is agreeable.

Photo taken on June 20, 2019 shows part of an ecological ranch in Sujiwan Village of Haibei Tibetan Autonomous Prefecture, northwest China's Qinghai Province. The plateau climate helps attract tourists to visit the ranches during summer time when the weather here is agreeable.

staffs walk at an ecological ranch in Sujiwan Village of Haibei Tibetan Autonomous Prefecture, northwest China's Qinghai Province, June 20, 2019. The plateau climate helps attract tourists to visit the ranches during summer time when the weather here is agreeable.

Aerial photo taken on June 21, 2019 shows an ecological ranch in Sujiwan Village of Haibei Tibetan Autonomous Prefecture, northwest China's Qinghai Province. The plateau climate helps attract tourists to visit the ranches during summer time when the weather here is agreeable.