Twelve surfing masters from home and abroad have been competing in a contest on east China’s Qiantang River. /China News Service Photo

The two top-scoring teams from China, the US, Australia, Brazil and Spain will enter the final round on Saturday. /China News Service Photo

The Qiantang River is known for one of the world's largest tidal bores, which can reach up to nine meters in height and travel at speeds  up to 40 kilometers per hour. /China News Service Photo

Due to astronomical reasons, the largest waves usually form around the Mid-Autumn Festival, when thousands of visitors are drawn to watch the annual spectacle. /China News Service Photo