Ho Chi Minh City was originally the capital of South Vietnam, named Saigon. It was renamed Ho Chi Minh City after the unification of North and South Vietnam in 1976. There are nearly 10 million people (7.5 million of them are permanent residents) and as many as 5 million motorcycles. This is the first impression we have of the city when we see the torrential motorcycle camp outside the windows. The motorcycle army in the street is shocking. If we saw the outline of the torrential current with flashing lights last night, we could see the details of the torrential current in front of us. Motorcycles of all kinds flocked in, especially when waiting for the traffic lights at the intersection, the torrent after the short gap became more turbulent. Men and women, old and young, slippers or leather shoes, masks, family members, fishing in disorder and so orderly. Rarely see the crazy rush, rarely see the collision of each other, and rarely see the seemingly possible accident. The qualities of these riders can be seen only when all motorcyclists wear their helmet consciously. The car then traveled along the embankment area of Ho Chi Minh City, accompanied by a black river outside the window, two of which were all kinds of three or four-storey residential buildings. Feng Dao told us that this is Chinatown in Ho Chi Minh City, because most of the people living here are Chinese-Americans. They just drifted across the sea and then drifted along the river to live and work in peace and contentment. Although not wide rivers are now seriously polluted, history will not be forgotten because of pollution.