With the development of the horse breeding industry,abundant experiences were accumulated throughout the ages. The most famous master was named Bole,and others like him that followed also adopted the name. The word "Bole" became a Chinese idiom. The monograph on distinguishing fine breeds of horses by Bole is the earliest of its kind in the world. Other monographs on the subject also appeared during the Tang Dynasty.

Horses is China are mainly distributed in the northern regions，including the vast area of Xinjiang and Qinghai in the west of Lanzhou,Inner Mongolia, Northeast China and the northern part of North China,the mountainous regions in Sichuan Province, Yunnan and Guizhou Plateau. The number of horses in Northeast, Northwest and North China accounts for three-fourths of the country's total.