《管子·山至数》
若是从事牧养的官员，照料牛马没有折损死亡的，就从 都 一级提升为县级。
若其事唐谀圉牧食之人养视不失捍殂者，去其都秩，与其县秩。
If any officials of animal husbandry increase the number of cattle and horses without loss or death, they will be promoted to the county level from the prefecture level.