1, national unity, social stability and political clarity. For example, during the Han and Tang dynasties, there were some scenes of peace and prosperity, such as Wenjing, Zhenguan and the rule of Kaiyuan, which provided a good social environment for economic development.

2, the ruling class pay attention to adjust the ruling policy, encourage the development of production. For example, during the reign of Emperor Gaozu, Emperor Wendi and Emperor Jingdi, the policy of rest and recuperation continued, which fully mobilized the enthusiasm of farmers for production, and the economy developed in the early Han Dynasty, resulting in the rule of cultural scenery.

3. Pay attention to water conservancy construction, reform production tools and popularize advanced production technology. For example, when Emperor Wu of the Western Han Dynasty mobilized tens of thousands of migrant workers to control the Yellow River; Both Han and Tang dynasties attached great importance to the reform of production tools. Rickshaw was invented in the Han dynasty, and in the Tang dynasty, curved plow and tube cart were made.

4. The hard work of the broad masses of working people. For example, during the Southern and Northern Dynasties of the Three Kingdoms and the Liao, Song, Xia, Jin and Yuan Dynasties, the economic development in the south of the Yangtze River, mainly due to the southward migration of the northern working people, brought advanced tools and advanced production technology and made joint efforts with the people in the south.

5. Establishment of new system. For example, the establishment of feudal system in the Warring States period promoted the development of productive forces.

6. Strengthen national integration. The strengthening of ethnic integration has promoted economic and cultural exchanges between ethnic groups and is conducive to economic development. Such as the reform of Emperor Xiaowen in the Northern Wei Dynasty and the unification of the Yuan Dynasty.

7. Strengthen foreign exchanges. For example, the introduction and popularization of Zhancheng rice in the Song Dynasty and the introduction of a large number of crops in the Ming Dynasty are all conducive to economic development.

Two or more of the above factors may play a role in a certain dynasty, depending on the actual situation.

I didn't write this myself. I wish you progress in your study.