1. Qi Helu,

2. Eastern Qi, Southern Chu, Western Qin and Northern Zhao.

Question 3. The three families are divided into Jin.

4. From the Spring and Autumn Period to the Warring States Period, due to the constant conquest and annexation, there were fewer and fewer vassal states, which formed a situation in which the seven heroes of the Warring States were separated.

Reflect as

Economically:

1. During the Spring and Autumn Period and the Warring States Period, great progress was made in agricultural technology. Niu Geng has been widely used. Due to the extensive use of iron farm tools, the development of irrigation and the progress of agricultural technology, especially the improvement of farmers' enthusiasm for production, the output per unit area has increased.

2. Before the Spring and Autumn Period, industry and commerce were mainly run by the government, the labor force was slaves, and there were few private businessmen. After the mid-Spring and Autumn Period, with the gradual establishment of private ownership of land and the emergence of feudal production relations, the industrial and commercial departments gradually broke away from the support of the government and developed in the direction of private operation, resulting in private handicrafts and independent individual craftsmen who mainly produced goods.

It was the invention of pig iron smelting technology that marked the economic breakthrough in the Spring and Autumn Period.

Political aspects:

1. During the Spring and Autumn Period and the Warring States Period, there was a struggle between public and private power, and power gradually moved down. Tian Daiqi, the three tribes were divided into Jin, and so on, and there was a phenomenon of "accompanying the minister to celebrate the national life".

2. Political reform movements have appeared in many countries. Li Kui of Wei, Wuqi of Chu and Shang Yang of Qin. It strengthened the monarchical power, weakened the power of ministers and promoted the emergence and development of feudal relations of production.

3. Transition from official system to official system, and transition from official system to salary system.

Social aspects:

1. The social structure changed and the gentry class rose.

2. The clan system collapsed.

3. Realizing the first national integration in the history of the Chinese nation.

Legal system:

During the Spring and Autumn Period, countries issued written laws, which broke through the old tradition, dealt a heavy blow to the monopoly of legal privileges by nobles, was conducive to social development, and was also a denial of the ritual system in the Western Zhou Dynasty.

Military aspects:

1. Changes in military sources: conscription is the main military source, and county and county ranks become the main military source.

2. Changes in weapons and methods of warfare. Infantry is becoming more and more important, and new varieties such as crossbowmen and cavalry appear.

3. The monarch's control over the army is also constantly strengthening, and the tiger symbol system is an example.