Did the large-scale and frequent maritime trade in ancient China first appear in the Six Dynasties? During the Han Dynasty, maritime trade was inferior to land trade.

It should be the Song Dynasty, the only dynasty in China history that did not restrict businessmen. There were frequent maritime exchanges, and even the maritime fleet of the Song Dynasty was at the leading level in the world at that time. The Han Dynasty was mainly the Silk Road, and the maritime trade was not as good as the land trade. However, maritime trade is indeed an indispensable part.