1840-1842年鸦片战争 签订《南京条约》中国开始沦为半殖民地半封建社会
1856-1860年第二次鸦片战争,签订《天津条约》《北京条约》等,中国半殖民地化程度进一步加深
1894年-1895年 甲午中日战争签订《马关条约》中国半殖民地程度大大加深
1900-1901年 八国联军侵华战争 签订《辛丑条约》中国完全沦为半殖民地半封建社会。
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