A constructor works at a height of about 500 meters at the construction site of a high rise building in Wuhan, central China's Hubei Province, Aug. 11, 2020. The constructors need to deal with the height and the summer heat. (Photos: Xinhua/Xiao Yijiu)

Constructors work at a height of about 500 meters at the construction site of a high rise building in Wuhan, central China's Hubei Province, Aug. 11, 2020. The constructors need to deal with the height and the summer heat.

Constructors work at a height of about 500 meters at the construction site of a high rise building in Wuhan, central China's Hubei Province, Aug. 11, 2020. The constructors need to deal with the height and the summer heat.

Constructors work at a height of about 500 meters at the construction site of a high rise building in Wuhan, central China's Hubei Province, Aug. 11, 2020. The constructors need to deal with the height and the summer heat.

Constructors work at a height of about 500 meters at the construction site of a high rise building in Wuhan, central China's Hubei Province, Aug. 11, 2020. The constructors need to deal with the height and the summer heat.

A constructor works at a height of about 500 meters at the construction site of a high rise building in Wuhan, central China's Hubei Province, Aug. 11, 2020. The constructors need to deal with the height and the summer heat.