(idiom) the invasion and mass migration of non-Han nomadic tribes into northern China during the 4th century CE, leading to the collapse of the Western Jin dynasty; also known as the Five Hu rebellion.

the Sixteen Kingdoms period (304–439 AD), a time of political fragmentation in Northern China involving five non-Han ethnic groups including the [[匈奴|匈奴|xiong1 nu2]], [[鲜卑|鮮卑|xian1 bei1]], [[羯|羯|jie2]], [[氐|氐|di1]], and [[羌|羌|qiang1]]