Discrimination of Chinese vocabulary

The traffic is very heavy, which means there are many cars on the road. Cars are like running water, and horses are like dragons. Used in conjunction with bustling scenes.

The river will never stop flowing. Used for pedestrians, cars, horses and boats.

An endless stream, coming and going. It is also used for people, cars, horses and boats. But the artistic conception is different, with fewer people, but they keep coming. A steady stream of people is like a river.