What are the main reasons for the economic development in the South of Song Dynasty?

1. The south itself is related to the development of farming economy, with fertile land and sufficient water and heat.

2. Since the Eastern Jin Dynasty, there have been few wars in the south, and the society is relatively stable. A large number of northern immigrants, such as Yongjia Rebellion in the late Western Jin Dynasty and Jingkang Rebellion in the late Northern Song Dynasty, seriously destroyed the northern economy, and a large number of people moved south, bringing advanced production methods and promoting the development of science and technology in the south.

With the opening of the Grand Canal in Sui Dynasty, materials from the south can be transported to the north smoothly. Both the Northern Song Dynasty and the Southern Song Dynasty relied on the grain supply in the south, supported by policies, and the tax policy in the south was relatively loose, which further stimulated the development of agriculture in South China.

4. In the Southern Song Dynasty, in order to alleviate the crisis of national fiscal revenue, coastal cities such as Kaihaitong, Quanzhou and Suzhou became the largest ports at that time, and the southern commodity economy was also very prosperous.

5. In addition, during the Northern Song Dynasty, the north was always the frontier of confrontation with the Khitan and Nuzhen regimes, and it was also the military buffer zone considered by the imperial court at that time. It is conceivable that this place will not receive much economic attention from the government, and the south is already the economic center at this time. Of course, it is not difficult to understand the idea of not deliberately operating the north.

In a word, the superior conditions of the south, the relatively stable and open society, the advantages of population and technology, and the support of government policies have created the dual prosperity of the farming economy and commodity economy in the south.