Despite the fact that Harbin is one of the coldest cities in China with an average January temperature of -13 ° C, millions of visitors flock here every year to visit the world famous Harbin International Festival of Ice and Snow Sculptures. Visitors can enjoy the view of more than two thousand ice sculptures, incredible light shows and 750,000 square meters of event space. From 10 to 15 million people come to Harbin every January to see this sight. Due to the constant sub-zero temperature, the exhibits are open for months. The official festival runs from January 5th through February. An important event during the festival is swimming in the Sungari River. Some swimmers train for months to prepare their bodies for icy water.