The glint of the sun on Wulan Lake dazzles on the remote desert of Alxa League in north China's Inner Mongolia Autonomous Region, August 29, 2021. /CFP

The agate red lake is also known as "the heart of the Earth". /CFP

It turns pink and red because of the enormous upsurge in red algae found in the salt lake that dried up in 1995. /CFP