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.Photo: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.Photo: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.Photo: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.Photo: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.Photo:Xinhua