The Qiantang River in east China's Zhejiang Province is home to the world's largest tidal bore, a strong tide that pushes up the river against the current along a coast where a river empties into an ocean or sea. The best viewing period for the Qiantang River's tidal bore starts in the seventh month of the Chinese lunar calendar. Returning tidal bore, criss-cross tidal bore and one-line tidal bore are three common types of tidal bores in the Qiantang River. Join CGTN to witness this impressive sight.