《明史·志·卷五十》
济南、兖州、束昌、开封、彰德、卫辉。凡是军民饲养牧马，根据他的人手产业，给予他种马。
凡军民孳牧，视其丁产，授之种马。
Jinan, Yanzhou, Shuchang, Kaifeng, Zhangde, Weihui. All military and civilian horse breeders are given breeding stallions based on their manpower industry.