1. koi fish goldfish farm in Mingxi, Henan Province: located in Henan Province, established in 1997, it is an enterprise integrating goldfish and koi fish breeding.

2. koi fish Farm in Penglai, Shandong Province: Located in Penglai City, Shandong Province, it was established at 200 1, and it is an enterprise specializing in koi fish breeding.

3. Chifeng koi fish Farm: Located in Shanghai, established in 2003, it is an enterprise specializing in koi fish breeding and reproduction.

4. Daxin Taihe koi fish Breeding Factory: Located in Qingdao, Shandong Province, established in 2005, it is an enterprise specializing in koi fish breeding.

These koi fish cities are well-known and have a wide influence on the domestic fish industry in koi fish.