Tourists visit Mingsha Mountain and Yueyaquan (Crescent Spring) scenic spot in Dunhuang City, northwest China's Gansu Province, April 3, 2021. (Xinhua)

Tourists visit Mingsha Mountain and Yueyaquan (Crescent Spring) scenic spot in Dunhuang City, northwest China's Gansu Province, April 3, 2021. (Xinhua)

Tourists visit Mingsha Mountain and Yueyaquan (Crescent Spring) scenic spot in Dunhuang City, northwest China's Gansu Province, April 3, 2021. (Xinhua)

Tourists take photos amid tulips at Tianbo General Yang Ye's Mansion scenic spot in Kaifeng, central China's Henan Province, April 3, 2021. (Xinhua)