牙人,又名牙郎,汉代曾称驵侩。《史记集解》说:“驵,马侩也。”可能起初只主持牲畜交易,后来约定俗成,各种物业交换一概经由他们作中介了。《资治通鉴》注者在安禄山出身互市牙郎一文下写道:“牙郎,驵侩也。南北物价定于其口,而后相与贸易。”按注文理解,牙人在交换中的双向沟通作用很早就获得社会认同。然而这种情况并没有使牙人在自己的岗位上坚守如初。随着历史的演进,牙人神不守“舍”了,他们固有的中介人职能 Dental, also known as the tooth Lang, Han dynasty had said 驵 侩. “Shi Ji Jieshi” said: “驵, 马 侩 also.” May initially be the first domination of livestock transactions, and later agreed that all kinds of exchange of property through them as an intermediary. According to the annotated article, the dental prosthesis is exchanged by the toothbrush The two-way communication in the early recognition of the community. However, this situation did not make the dentist in his position stick to its roots. As history has evolved, the Dental people have been unconscionable and have their own role of intermediary