Photo taken with a mobile phone shows tulips along the Yellow River in Yongjing County, northwest China's Gansu Province, on April 16, 2020.

A visitor is seen among the tulips along the Yellow River in Yongjing County, northwest China's Gansu Province, April 16, 2020.

Visitors view the tulips along the Yellow River in Yongjing County, northwest China's Gansu Province, April 16, 2020.

Visitors walk among the tulips along the Yellow River in Yongjing County, northwest China's Gansu Province, April 16, 2020.

Photo taken on April 16, 2020 shows tulips along the Yellow River in Yongjing County, northwest China's Gansu Province.

Photo taken on April 16, 2020 shows tulips along the Yellow River in Yongjing County, northwest China's Gansu Province. (Photos: Xinhua)