The Three Kingdoms of the late Han Dynasty were in the crucial period of the transition from land to sea of the Silk Road and the formation of the maritime Silk Road. Due to the need of fighting with Cao Wei and Liu Shu on the Yangtze River and sea traffic, Sun Wu actively developed the naval army, and the design and manufacture of ships made great progress, with advanced technology and large scale. Other southern regimes behind The Three Kingdoms (Eastern Jin, Song, Qi, Liang and Chen) were also in confrontation with the north, which also promoted the development of shipbuilding and navigation technology. The accumulation of navigation experience provided good conditions for the development of the Maritime Silk Road.
After Wei and Jin dynasties, the Maritime Silk Road was formed: starting from Guangzhou, passing the east sea of Hainan Island, going straight through the Xisha Islands to the South China Sea states, then passing through the Strait of Malacca, and sailing straight to the Indian Ocean, the Red Sea and the Persian Gulf. Foreign trade involved 15 countries and regions, and silk was the main export product.
