Aerial photo shows tourists visiting the Harbin Ice-Snow World in Harbin, northeast China's Heilongjiang Province, Feb. 27, 2022. The 23rd Harbin Ice-Snow World closed on Sunday. (Xinhua/Zhang Tao)

　　Aerial photo shows tourists visiting the Harbin Ice-Snow World in Harbin, northeast China's Heilongjiang Province, Feb. 27, 2022. The 23rd Harbin Ice-Snow World closed on Sunday. (Xinhua/Xie Jianfei)

　　Aerial photo shows tourists visiting the Harbin Ice-Snow World in Harbin, northeast China's Heilongjiang Province, Feb. 27, 2022. The 23rd Harbin Ice-Snow World closed on Sunday. (Xinhua/Xie Jianfei)

　　Aerial photo shows tourists visiting the Harbin Ice-Snow World in Harbin, northeast China's Heilongjiang Province, Feb. 27, 2022. The 23rd Harbin Ice-Snow World closed on Sunday. (Xinhua/Xie Jianfei)

　　Tourists visit the Harbin Ice-Snow World in Harbin, northeast China's Heilongjiang Province, Feb. 27, 2022. The 23rd Harbin Ice-Snow World closed on Sunday. (Xinhua/Zhang Tao)

　　Aerial photo shows tourists visiting the Harbin Ice-Snow World in Harbin, northeast China's Heilongjiang Province, Feb. 27, 2022. The 23rd Harbin Ice-Snow World closed on Sunday. (Xinhua/Zhang Tao)

　　Aerial photo shows tourists visiting the Harbin Ice-Snow World in Harbin, northeast China's Heilongjiang Province, Feb. 27, 2022. The 23rd Harbin Ice-Snow World closed on Sunday. (Xinhua/Xie Jianfei)

　　Tourists pose for photo at the Harbin Ice-Snow World in Harbin, northeast China's Heilongjiang Province, Feb. 27, 2022. The 23rd Harbin Ice-Snow World closed on Sunday. (Xinhua/Zhang Tao)

　　Tourists visit the Harbin Ice-Snow World in Harbin, northeast China's Heilongjiang Province, Feb. 27, 2022. The 23rd Harbin Ice-Snow World closed on Sunday. (Xinhua/Zhang Tao)

　　Tourists visit the Harbin Ice-Snow World in Harbin, northeast China's Heilongjiang Province, Feb. 27, 2022. The 23rd Harbin Ice-Snow World closed on Sunday. (Xinhua/Zhang Tao)

　　Tourists visit the Harbin Ice-Snow World in Harbin, northeast China's Heilongjiang Province, Feb. 27, 2022. The 23rd Harbin Ice-Snow World closed on Sunday. (Xinhua/Xie Jianfei)

　　Tourists visit the Harbin Ice-Snow World in Harbin, northeast China's Heilongjiang Province, Feb. 27, 2022. The 23rd Harbin Ice-Snow World closed on Sunday. (Xinhua/Xie Jianfei)

　　Tourists visit the Harbin Ice-Snow World in Harbin, northeast China's Heilongjiang Province, Feb. 27, 2022. The 23rd Harbin Ice-Snow World closed on Sunday. (Xinhua/Zhang Tao)

　　Aerial photo shows tourists visiting the Harbin Ice-Snow World in Harbin, northeast China's Heilongjiang Province, Feb. 27, 2022. The 23rd Harbin Ice-Snow World closed on Sunday. (Xinhua/Zhang Tao)

　　Aerial photo shows tourists visiting the Harbin Ice-Snow World in Harbin, northeast China's Heilongjiang Province, Feb. 27, 2022. The 23rd Harbin Ice-Snow World closed on Sunday. (Xinhua/Zhang Tao)

　　Tourists visit the Harbin Ice-Snow World in Harbin, northeast China's Heilongjiang Province, Feb. 27, 2022. The 23rd Harbin Ice-Snow World closed on Sunday. (Xinhua/Xie Jianfei)

　　Tourists visit the Harbin Ice-Snow World in Harbin, northeast China's Heilongjiang Province, Feb. 27, 2022. The 23rd Harbin Ice-Snow World closed on Sunday. (Xinhua/Zhang Tao)

　　Tourists visit the Harbin Ice-Snow World in Harbin, northeast China's Heilongjiang Province, Feb. 27, 2022. The 23rd Harbin Ice-Snow World closed on Sunday. (Xinhua/Xie Jianfei)