When did the Qing Dynasty move the frontier and ban the sea?

The specific policy is called: the order to relocate the sea or the order to relocate the territory in the 12th year of Qing Shunzhi (1655). The Qing government ordered: "It is forbidden to sail in coastal provinces, and offenders will be severely punished." Of course, the reason for "sailing into the sea without authorization" is "stability", because most of the Han people who refuse to join, continue to resist or even flee to other countries are related to the sea and navigation. . In the early Qing dynasty, the Qing government had almost no naval power. In order to prevent the Zheng clique from helping the Ming Dynasty to restore its power, the Qing government adopted the policy of sea ban to prevent the coastal residents from subsidizing it. Assistant Minister Ao Bai ordered all residents from Shandong to Guangdong to move 50 miles inland, burned down all the houses there, and took measures to prohibit coastal residents from going to sea.

There are two historical influences:

1, the relocation order is an extremely reactionary measure. Since the Song and Ming Dynasties, the maritime trade in the coastal areas of China has been quite developed, which has greatly promoted the economic development and scientific and cultural progress in the coastal areas. However, the brutal order of the Qing dynasty to move to the sea destroyed hundreds of years of navigation achievements, and there were no crows along the coast for thousands of miles, and the navigation trade plummeted and could not be restored. This result directly led to the Qing Dynasty's closed-door policy in modern times, which made China's navigation technology far behind that of the West, and eventually made western warships run wild in the Sea of China.

2. Although reactionary, it stopped the economic aggression of western powers, safeguarded national sovereignty and was conducive to domestic stability.