一自东汉魏晋以来,士族豪门势力日益发展,封建统治阶级为了巩固和加强他们的统治力量,采取维护士族豪门地主利益的九品官人之法——九品中正制。他们在占有大量土地、控制着多数农民的基础上,发展了这一制度,从而使这些豪门大族成为世代相承的门阀势力。他们不但利用其种种世袭的封建特权,对农民进行残酷的剥削和压迫,形成武断乡曲的地方特殊势力;更重要的是他们之中很多人成为封建政权中的重要人物, Since the Eastern Han Dynasty and the Wei and Jin Dynasties, the factional wealthy forces have been developing day by day. In order to consolidate and strengthen their dominance, the feudal ruling class adopts the nine-character principle of maintaining the interests of landlords and wealthy families. They have developed this system on the basis of possessing a large amount of land and controlling the majority of peasants so that these wealthy and powerful people will become the gatekeepers of the same generation. Not only did they use their hereditary feudal privileges to carry out brutal exploitation and oppression of peasants and form the local special forces that arbitrarily set themselves apart from others. More importantly, many of them became important members of the feudal regime,