Aerial photo taken on July 9, 2020 shows the landscape at a section of the Yellow River in Hualong Hui Autonomous County in Haidong City, northwest China's Qinghai Province. As the local ecological environment improved in recent years, more and more land along the river here has been covered in lush green vegetation. (Xinhua/Wu Gang)

Aerial photo taken on July 10, 2020 shows the landscape at a section of the Yellow River in Hualong Hui Autonomous County in Haidong City, northwest China's Qinghai Province. As the local ecological environment improved in recent years, more and more land along the river here has been covered in lush green vegetation. (Xinhua/Wu Gang)

Aerial photo taken on July 10, 2020 shows the landscape at a section of the Yellow River in Hualong Hui Autonomous County in Haidong City, northwest China's Qinghai Province. As the local ecological environment improved in recent years, more and more land along the river here has been covered in lush green vegetation. (Xinhua/Wu Gang)

Aerial photo taken on July 10, 2020 shows the landscape at a section of the Yellow River in Hualong Hui Autonomous County in Haidong City, northwest China's Qinghai Province. As the local ecological environment improved in recent years, more and more land along the river here has been covered in lush green vegetation. (Xinhua/Wu Gang)