The country is huge and the responsibility for it is heavy. A huge country cannot be evenly governed by the emperor alone; the responsibility is too great for one man. Thus, the emperor should give land to relatives to guard the outlying prefectures [areas]. Whether the country is at peace or in danger, they cooperate; whether the country is thriving or declining, they work together with one heart.
What advice does Taizong give on the best way to rule?
The emperor should give some land to smaller empires and form alliances.
The emperor should step down and let family members rule.
The emperor should ask family members to become involved in governing the empire.
The emperor should govern the empire alone and keep all control over the people.