C62 Surprise
Right now, the Tongzhou region was where the later generation of Jiangsu Province was located, separated by the sea from the country of Fusang Island, where the pirates resided.
Actually, the distance from here to Fusang Island was not that close.
According to the distance, the northeast route was the best if one wanted to explore Fusang. The next was to sail from the Qinhuang Island in Hebei