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祖冲之(公元429—500年),是我国古代一位杰出的科学家。祖冲之,字文远,原籍范阳遒县(今河北涞源)人,他生活的时代是我国南北朝时南朝的宋朝和齐朝。西晋末年,西北各族统治者互相混战,黄河流域的社会经济受到了严重的破坏,北方士族纷纷逃往江南,祖冲之的家随着也到了江南。北方士族南迁后和南方士族勾结建立起来的东晋王朝,仍然推行儒家的守旧路线,反对统一,鱼肉人民。公元299年,江淅地区爆发了孙思领导的农民大起义,这次起义坚持十二年,对门阀士族腐朽势力是一次沉重的打击。公元402年,具有法家思想的刘裕,藉门阀势力遭到沉重打击的机会,一方面镇压了农民起义,另一方面消灭了东晋王朝,建立起南宋王朝。刘裕推行庶族地主革新的法家路
Zu Chongzhi (429-500 AD) is an outstanding scientist in ancient China. Zu Chongzhi, the text is far, the original Fan Yang 遒 County (now Hebei Yuanyuan) people, his life is the Southern and Northern Dynasties period of our Southern Song Dynasty and Qi Dynasty. At the end of the Western Jin Dynasty, the rulers of various ethnic groups in the northwest were fighting melee with each other. The social and economic conditions in the Yellow River Basin were severely damaged. The northern factions fled to the south after another. The Eastern Jin dynasty, founded by the northern faction after the southward movement of the southern clan, was still in the process of establishing a conservative line with the Confucianists and opposing the unification of the fish people. In 299 AD, a peasant uprising led by Sun Ssu broke out in Jiangtao area. This uprising persists for 12 years and is a heavy blow to the decadent forces belonging to the gate warriors. In 402 AD, Liu Yu, with legalist ideas, was hit hard by the door-opener. On the one hand, it suppressed the peasant uprising and on the other hand eliminated the Eastern Jin dynasty and established the Southern Song Dynasty. The Lawyer Road to Promote the Landlord Reform of