The Dragon Boat festival is known as dragon-boat racing(龙舟赛). Dragon-boat racing is the most popular activity during the festival, expecially (尤其) in South China. A dragon boat looks like a dragon, and is painted in red, white, yellow or black. Usually, a dragon boat is 20 to 40 metres long, and needs 20 people to row. Boatmen row the boat in cadence(节奏) with the drumbeats(鼓点), as the captain(船长) in the front of the boat waves a small flag to help coordinate(使动作协调) the rowing.Dragon-boat racing is quite a spectacle(奇观). Now it becomes a popular activity in South China. International(国际的)dragon-boat racing is held in Guangzhou and Hong Kong every year.