The
wugongchuan were built based on what the Chinese observed from Portuguese ships. The mid-
Ming dynasty text
Longjiang chuanchang zhi (龍江船廠志,
Account of the Longjiang Shipyard) describes their observations as follows: "The Portuguese ships had a length of ten
zhang and a width of three
zhang (approximately 36 × 11 meters). They had forty oars on each side, carried three to four guns, had a sharp-pointed
keel and a flat deck and were thus safe against storms and high waves. Moreover, the crew was protected by breastwork and therefore had no need to fear arrows and stones. There were two hundred men altogether, with many pulling the oars, which made these ships very fast, even if there was no wind. When the guns were fired and the gun balls poured like rain, no enemy could resist. These ships were called
wugongchuan." The same text also carries an alternate description of the
wugongchuan along with an illustration. In this description, the
wugongchuan's dimension is given as eight
zhang by one
zhang and six
chi, and the illustration shows a flat
keel in traditional Chinese style, two
masts, and nine oars on each side of the ship. This description is associated with a smaller version of the Portuguese galley that the Chinese constructed in Nanjing, their own
wugongchuan. The drastically reduced number of oars may be explained by substituting some of the oars with Chinese
yulohs, or sculling oars at the
stern of the ship. The keel being flat may indicate difficulties encountered by the Chinese to adjust to European designs, despite the text noting that the
prow and stern of a
wugongchuan differed from other Chinese ships. ==History==