Great changes have taken place in the situation.

(1) Economy: During the Spring and Autumn Period and the Warring States Period, the use of ironware and the popularization of Niu Geng marked a significant improvement in social productivity. China's feudal economy has been further developed, especially in the north. The leap of productive forces triggered the revolution of production relations. During the Spring and Autumn Period and the Warring States Period, the well field system was gradually replaced by feudal private ownership of land, and was finally established through reforms in various countries. (2) Politics: During the Spring and Autumn Period and the Warring States Period, the feudal war destroyed the old order of slavery and brought disaster and pain to the people. However, the result of the war accelerated the process of reunification, promoted national integration and accelerated the pace of change. With the growing strength of the emerging landlord class, they successively carried out political reform movements in various vassal States, and the new feudal system was finally established. Qin, the country with the most thorough political reform, became the strongest of the vassal States and later developed into a unified core force. (3) Ideologically, culture is a reflection of politics and economy in a certain period. During the Spring and Autumn Period and the Warring States Period, economic development promoted scientific and technological progress. Social changes have contributed to the unprecedented activity of ideas, the unprecedented prosperity of literature and art, the emergence of the literati class, writing books and saying things, and the situation of a hundred schools of thought contending.