“中人”身份选择不以地位、经济、威望为拘,“面子”的大小并不是选择“中人”的绝对标准。一般亲族较为普遍的担任中人,妇女、佃人也可以作中参与到契约关系中。中人的选择是契约双方根据具体情况、实际需要,在其特定的乡土社会网络中,亲疏、远近、尊卑自由组合的结果,自身品质良好的任何人都可以成为中人。 “Man ” identity choice not to status, economy, prestige for the detention, “face ” size is not the absolute standard of choice “man ”. Generally relatives generally act as middlemen, women and tenants can also be involved in the contractual relationship. The choice of the middleman is the result of the free combination of progeny, sparseness, farness, and supremacy in the specific local social network of both parties according to the specific circumstances and actual needs. Anyone of good quality can become a middleman.