If it is within the scope of river management, with the approval of the river department, fish ponds can be dug and built; Without approval, you can't dig and build fish ponds, otherwise you will be punished by the river authorities (in addition to correcting illegal acts and taking remedial measures, you can also warn, fine and confiscate illegal income). If it is in the dike safety protection zone, it is forbidden to dig and build fish ponds.