upward is good. In the traditional culture of China, carp represents wealth and status, and the image of carp is very good, and the head of carp is upward. Koi fish belongs to Cyprinidae in biology, and there are more than 3,7 species of CYPRINIDAE in 21 genera in the world. It is a kind of high-grade artistic ornamental fish that is popular in the world today, and has the reputation of "living gem in water" and "swimming artwork".