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The Tang dynasty poet Han Yu (768–824) wrote a well-known fable about Bole and qianlima.
Only when an era has a man like Po-le are there thousand-li horses. Thousand-li horses are common, but Po-les, on the other hand, are rare. Thus even though there may be famous horses, they only become abused under the hand of the man to whom they are enslaved, and they die in the stables—never having been recognized as thousand-li horses. Thousand-li horses at times consume a whole dan [approximately 60 kg] of grain in one feeding. If the one who feeds them does so without knowing they are capable of a thousand-li, then even though they may have the ability to go so far, they, having not eaten their fill, are lacking in strength, and their talent and beauty are not apparent. Moreover, if one wanted to rank them with regular horses, they would not make the grade. How then could they be asked to have the ability of going a thousand li? They are whipped inappropriately and fed in such a way that they cannot fulfil their innate talents. Yet when they cry out, they cannot be understood. With whip in hand the man approaches them and says, "There are not any good horses in the empire." Alas! Is it that there are really no good horses or is it perhaps that there is no one who really understands horses?