The biological species in American rivers are relatively single, and there are too few conditions to limit the survival of carp.
Carp is a bottom-eating fish, and likes to push underwater to find food.
The introduction of carp is to clean up the excessive organic matter and garbage in rivers, lakes and underwater, but carp is still flooded because of its superior conditions and vitality.
China people, like carp, live silently all over the world. As long as there is no violence and bloodshed, and there are no unreasonable restrictions, China people can always live better than the locals.