Question

How did Shi Huangdi break the feudal system?

Answer 1

He took away land from the nobles and gave it to peasants, who paid taxes directly to his government. He then forced them all to move to Xianyang, the Qin capital, where officials kept watch over them to prevent an uprising against him.

Answer 2

following up on Li Si's recommendation, Shi Huangdi nullified the old medieval framework, which had dispersed most terrains to amazing rulers. ... To promote his grip of intensity and control, Shi Huangdi requested all the imperial groups of the vanquished realms to move to his capital city of Xianyang. There he could oversee them.