Tourists line up at 9 a.m. Monday as they wait to enter the Harbin Ice and Snow World, which opens at 10:30 a.m. Photo: Zheng Haipeng/Caixin

Harbin Ice and Snow World visitors race toward the big slide attraction on Thursday. Photo: Zheng Haipeng/Caixin

Tourists line up at the gate of the big slide on Monday. Photo: Zheng Haipeng/Caixin

Children play at the Harbin Ice and Snow World on Friday. Photo：VCG

Visitors take in the sights at the Harbin Ice and Snow World. Photo: Zheng Haipeng/Caixin

Visitors take photos at the Harbin Ice and Snow World on Monday. Photo: Zheng Haipeng/Caixin

Tourists head to the exit of the Harbin Ice and Snow World on Sunday. Photo: Zheng Haipeng/Caixin

Visitors prepare to board buses to leave Harbin Ice and Snow World on Monday. Photo: Zheng Haipeng/Caixin