Workers work at a construction site for the Harbin Ice-Snow World, a renowned seasonal theme park opening every winter, in Harbin, northeast China's Heilongjiang Province, Dec. 14, 2020. (Photos: Xinhua/Xie Jianfei)

Workers work at a construction site for the Harbin Ice-Snow World, a renowned seasonal theme park opening every winter, in Harbin, northeast China's Heilongjiang Province, Dec. 14, 2020.

Aerial photo taken on Dec. 14, 2020 shows the construction site of the main tower for the Harbin Ice-Snow World, a renowned seasonal theme park opening every winter, in Harbin, northeast China's Heilongjiang Province.

Workers work at a construction site for the Harbin Ice-Snow World, a renowned seasonal theme park opening every winter, in Harbin, northeast China's Heilongjiang Province, Dec. 14, 2020.

Workers work at a construction site for the Harbin Ice-Snow World, a renowned seasonal theme park opening every winter, in Harbin, northeast China's Heilongjiang Province, Dec. 14, 2020.

A worker works at a construction site for the Harbin Ice-Snow World, a renowned seasonal theme park opening every winter, in Harbin, northeast China's Heilongjiang Province, Dec. 14, 2020.

Workers work at a construction site for the Harbin Ice-Snow World, a renowned seasonal theme park opening every winter, in Harbin, northeast China's Heilongjiang Province, Dec. 14, 2020.

Aerial photo taken on Dec. 14, 2020 shows the Harbin Ice-Snow World, a renowned seasonal theme park opening every winter, in Harbin, northeast China's Heilongjiang Province.

Photo taken on Dec. 14, 2020 shows the construction site of the main tower for the Harbin Ice-Snow World, a renowned seasonal theme park opening every winter, in Harbin, northeast China's Heilongjiang Province.