Fireworks burst in the sky as a visitor glides down a 521-meter ice slide at Harbin Ice-Snow World in Northeast China's Heilongjiang Province on January 1. The display illuminates the park's ice sculptures, making them sparkle against the night. The 521-meter slide is one of 24 built with about 15,000 cubic meters of ice. The number 521 sounds like "I love you" in Mandarin. The park is hosting its 27th winter festival. (Compiled by Fan Yuting)