Tusi systemis a special political systemin which successive feudal dynastiesin Chinahave ruled over the local people in ethnic minority areas by dividing the local chiefs into hereditary positions.

The Tusi had to obey the feudal dynasty. The soldiers led by the Secretary of State, the original only the responsibility of guarding the land, "nothing is loaded with the end of the plow, something is to repair the spear to war, the army is not far away from the labor of the garrison, the officer does not have to support the cost of the soldiers. With the completion of the Tusi system and the close relationship with the central dynasty, in the Ming Dynasty, the soil soldiers became one of the main source of the court, the court every war, the soil soldiers almost no service not from.

The Tusi official fortress

Tusi has supreme authority in its jurisdiction, and is the real "emperor of the soil", setting up its own prime minister, home affairs, Sheba, Tuji Zhou, Tuji Zhongjun, etc. Since the Song Dynasty, the smallest Tusi has been under the jurisdiction of the central government, and the largest Tusi has been under the jurisdiction of the central government, which is the Tusi. Since the Song Dynasty, the smallest administrative unit under its jurisdiction is the dong. The smallest administrative unit under the jurisdiction of the dong was the dong. There were fixed lots between the dong and the dong, generally bounded by hillsides and rivers, which were quite similar to the districts and communities today. Under the hole for the flag, flag is the Tusi regime soldiers and people of one organization, something is mobilized for the army, in order to prepare for the battle, nothing is scattered for the people, in order to practice farming and chiseling. Yongshun Division screen of the three states six governor's division, under which there are fifty-eight banners.