Aerial photo taken on June 11, 2019 shows a car running on the highway linking Zhalonggou with Nianbo Township in northwest China's Qinghai Province. A 50.79-km highway linking Zhalonggou and Nianbo Township in Qinghai Province opened to the traffic on Tuesday. (Photos: Xinhua)

Aerial photo taken on June 11, 2019 shows a car running on the highway linking Zhalonggou with Nianbo Township in northwest China's Qinghai Province. A 50.79-km highway linking Zhalonggou and Nianbo Township in Qinghai Province opened to the traffic on Tuesday.

Aerial photo taken on June 11, 2019 shows a car running on the highway linking Zhalonggou with Nianbo Township in northwest China's Qinghai Province. A 50.79-km highway linking Zhalonggou and Nianbo Township in Qinghai Province opened to the traffic on Tuesday.

A car runs on the highway linking Zhalonggou with Nianbo Township in northwest China's Qinghai Province, June 11, 2019. A 50.79-km highway linking Zhalonggou and Nianbo Township in Qinghai Province opened to the traffic on Tuesday.

A car runs on the highway linking Zhalonggou with Nianbo Township in northwest China's Qinghai Province, June 11, 2019. A 50.79-km highway linking Zhalonggou and Nianbo Township in Qinghai Province opened to the traffic on Tuesday.

Aerial photo taken on June 11, 2019 shows a car running on the highway linking Zhalonggou with Nianbo Township in northwest China's Qinghai Province. A 50.79-km highway linking Zhalonggou and Nianbo Township in Qinghai Province opened to the traffic on Tuesday.