The original :
赛龙舟（Dragon Boat Race）的习俗起源于中国南方。他们选择五月初五进行图腾庆典（totem ceremony）。图腾上最主要的象征物是龙，因为中国人认为自己是龙的传人，因此他们还做了龙舟。后来中国人将这一习俗与端午节联系起来。这是唯一一个源自中国南方的活动，这也许就是为什么今天龙舟比赛并不是在全中国都盛行的原因。现在龙舟比赛已经成为一项国际运动。这项运动在美国、加拿大、澳大利亚和新加坡都很流行。
My translation :
The custom of Dragon Boat Race began from the Southern China. They selected the 5th lunar day of the 5th lunar month as the totem ceremony. The dragon was the main symbol in the totem, because Chinese people thought they were the descendants of it. They also made dragon-like boat. Later, the Chinese connected this custom with the Dragon Boat Festival. This was the only event originating from the Southern China, which might be the reason why Dragon Boat Race doesn't prevail in the entire China today. Now, the Dragon Boat Race becomes an international event, which is popular in the USA, Canada, Australia, Singapore,etc.
