Workers lay ice bricks at a construction site for the 22nd Harbin Ice-Snow World, a renowned seasonal theme park opening every winter, in Harbin, northeast China's Heilongjiang Province, Dec. 10, 2020. (Photos: Xinhua)

Workers lay ice bricks at a construction site for the 22nd Harbin Ice-Snow World, a renowned seasonal theme park opening every winter, in Harbin, northeast China's Heilongjiang Province, Dec. 10, 2020.

A worker lays ice bricks at a construction site for the 22nd Harbin Ice-Snow World, a renowned seasonal theme park opening every winter, in Harbin, northeast China's Heilongjiang Province, Dec. 10, 2020.

Workers lay ice bricks at a construction site for the 22nd Harbin Ice-Snow World, a renowned seasonal theme park opening every winter, in Harbin, northeast China's Heilongjiang Province, Dec. 10, 2020.

Workers lay ice bricks at a construction site for the 22nd Harbin Ice-Snow World, a renowned seasonal theme park opening every winter, in Harbin, northeast China's Heilongjiang Province, Dec. 10, 2020.