During the Qing Dynasty's reign, the Nan-Chang Bao'An Palace was near the sea; it was favorable for shipping and an essential fort for the military. During the reign of Emperor Kang-Xi, this location was build as a large-scale shipyard, and the autocratic warship was named Nan-Chang. According to Miscellaneous Records of Anping County, "there are two factories in the north and south, called military factories in the north. The government set them up to build sentinel ships. There are civilian factories outside the factories. It is called Chang- Zai, which was at the Lau-Gu-Shi (coral stone) area, there are sail factories nearby, Nan-Chang is shipbuilding and a carpenter category." There is a saying that the name of Nan-Chang is derived from private shipyards, but there is no actual historical evidence to support it. According to the existing text, the Nan- Chang Factory is more likely to be named after establishing a military factory.