Huzhou official website shows that the address of the breeding base of Rana nigromaculata in Nanxun, Huzhou is Wuren Village, Nanxun Economic Development Zone (moving eastward). The base is mainly based on circular ecological farming mode. Rana nigromaculata controls crop pests by eating insects, and its excrement is natural organic fertilizer, which can improve soil fertility. At the same time, the rice planted in the field can provide shelter for the growth of Rana nigromaculata, which not only improves the quality of crops and aquatic products, but also reduces agricultural non-point source pollution.