The books and records of the Tang and Song dynasties recorded that Silla and Bohai State paid tribute to the Tang dynasty with hair,and scholars have assumed that the hair was used for medical purposes.By scrutinizing the knowledge of the pre-Qin to Tang and Song dynasties on the medicinal uses of hair,as well as the knowledge and utilization of wigs,it shows that the hair of the"barbarians"was an important source material of wigs for the Central Plain dy-nasties.Through the comparison and analysis of historical materials,it can be seen that the hair of the Silla people met the standard of being"long and beautiful".Meanwhile,records from the Korean Peninsula also show that the hair provided by the Bohai State might have come from the Heishui Mohe people,who moved into its territory and was under its rule at that time.Heishui Mohe might also have the custom of"hair care".Therefore,the hair as a tribute from Silla and Bo-hai were used as wigs or were raw materials for making wigs,rather than for medicinal purposes.