The Harbin International Ice and Snow festival is an annual winter festival that takes place with a theme in Harbin, Heilongjiang, China, and now is the largest ice and snow festival in the world. At first participants in the festival were mainly Chinese, however it has since become an international festival and competition, with the 2018 festival attracting 18 million visitors and generating 28.7 billion yuan ($4.4 billion) of revenue. The festival includes the world's biggest ice sculptures.
Officially, the festival starts on January 5 and lasts till late February. However, exhibits often open earlier and stay longer, weather permitting. While ice sculptures are erected throughout the city, there are two main exhibition areas:
Sun Island is a recreational area on the opposite side of the Songhua River from the city, which features an expo of enormous snow sculptures.
Ice and Snow World is an area open in the afternoon and at night which features illuminated full size buildings made from blocks of 2–3' thick ice taken directly from the Songhua River. The park usually opens from late December to late February. In 1999, the first Ice and Snow World opened to public to celebrate the millennium.
Each year the park has to be rebuilt with newly designed ice buildings and snow and ice sculptures. In recent years, the park has been as large as 80 hectares.
During the festival, there are ice lantern park touring activities held in many parks in the city. Winter activities during the festival include Yabuli alpine skiing, winter-swimming in the Songhua River, and the ice-lantern exhibition in Zhaolin Garden.
According to en.wikipedia