Whta factors during the Quin and the Han worked against political stability and economic prosperity? ?

Question

and how did these factors contribute to the collapse of the Han?

Answer 1

End of Han Dynasty

After 200 years of Han rule, under Emperor Zhang, the Han dynasty fell into states of corruption and political power struggles among three groups of powerful individuals -- eunuchs, empresses' clans, and Confucian scholar-officials. None of these three parties was able to improve the harsh livelihood of peasants under the landholding families. Land privatizations and accumulations  went into the hands of the elite and successful ruling entities worked with these families, and consequently their policies favored the elite.

Taiping Taoist ideals of equal rights and equal land distribution quickly spread throughout the peasantry. As a result, the peasant insurgents of the Yellow Turban Rebellion swarmed the North China Plain, the main agricultural sector of the country. Power of the Liu royalty then fell into the hands of local governors and warlords, despite suppression of the main uprising of Zhang Jiao and his brothers. Three overlords eventually succeeded in control of the whole of China proper, ushering in the period of the Three Kingdoms. The figurehead Emperor Xian reigned until 220 when Cao Pi forced his abdication.