(1) Roots: the opposition between nobles and civilians, industrial and commercial slave owners and sharp social contradictions.

(2) Direct causes: Keelung riots and legislative failure in delacour.

(3) The fuse-Salami crisis intensifies social contradictions.

2. Measures

(1) issued a "decree" to abolish debt slavery.

(2) Developing industry and commerce: It is stipulated that all Athenian citizens must let their children learn a trade, prohibit the export of grain, and encourage the export of cash crops such as olive oil.

(3) Establish a property hierarchy, and divide citizens into four grades according to the amount of property, and each grade enjoys different political rights.

(4) Establish a meeting of 400 people: each of the four tribes chooses 100 people to form a meeting of 400 people, whose main function is to prepare the agenda for the pre-trial proposal of the conference.