During the development of ancient China, there were many dynasties, which affected the economic development to varying degrees. China has always supported the policy of emphasizing agriculture and restraining business since ancient times. China uses its unique natural environment to develop agriculture and realize self-sufficient small-scale peasant economy. China's maritime industry was very developed in the Yuan Dynasty, but it stagnated in the Ming Dynasty. This is because in the Yuan Dynasty, maritime transportation was needed to maintain food supply and tax revenue in the north. In order to consolidate the rule of the country, the Ming Dynasty imposed many prohibitions.

First, the Yuan Dynasty's dependence on southern grain We know that in the late Southern Song Dynasty, the economic center of China had moved southward. Once a barbarian land, it has become the land of 1 that the ruling class pays special attention to now. The Mongols were founded in the Yuan Dynasty and knew little about planting. After the establishment of the Yuan Dynasty, there were more Mongolians in the north, and the food supply in the north was insufficient. Therefore, the Yuan Dynasty needed to transport grain from the south and also needed taxes. In addition, they have opened up and repaired other rivers.

Second, the Ming dynasty consolidated its rule and banned shipping. Zhu Yuanzhang, the Ming emperor, was a very ambitious man. His aim was to unify the whole country. He knew a long time ago that many wealthy businessmen made a lot of money in shipping by taking advantage of the division of the country, and these wealthy businessmen did not want the reunification of the country. Contrary to Zhu Yuanzhang's ideas and goals, after the establishment of the Ming Dynasty, Zhu Yuanzhang banned all other individuals from maritime trade except the government, and shipping was affected. In addition, shipping will also affect the government's silver revenue, so that a large amount of silver from the country will flow into the hands of wealthy businessmen.

Although the developed shipping in Yuan Dynasty also caused some troubles, it also solved some important problems on the whole. The stagnation of shipping in the Ming Dynasty led to the slow development of commerce and less contact with the outside world. However, all kinds of measures in each dynasty have their necessity of implementation. There is no absolute right or wrong, just different analysis angles, and objective analysis can better enter history.