Han issues

The Han Dynasty might not have collapsed if there had been a division of jurisdiction over land.  They could have had one large and powerful emperor with power over smaller emperors who ruled small regions of the country.  This way, each small leader could take care of their region, while still staying loyal to the higher emperor.  The lower emperors could write laws and collect taxes for all the people, and the Dynasty, as a whole, would be a lot easier to control. If rebellions happened, the lower emperors could take care of it with firm military force.