Most Korean sources are slient on the role played by the Chinese navy in the Imjin wars, instead focusing on achievement of Admiral Yi and his "turtle ships". I think it should be noted that the Chinese navy was likewise formidable, though of course did not play as larger role as the Koreans. The typical FuChuan warship was heavier equipped than contemporary Korean or Japanese vessels. The armament was as follows...
One heavy cannon, one mortar, six large culverins, three falconets, a number of arrow-firing cannons, and sixty fire-lances.
The following quote is from the Wu Bei Zhi and is quoted by Kenneth swope in his "Crouching Tigers, secret weapons" article. "There was nothing that could match them on the seas, and the Japanese did not dare take them on"
Of course, the larger warships were complimented by smaller vessels, including flat bottomed ships. At the onset of the war the ministry of works built 20 large warships, 100 medium-sized ships, and 50 flat-bottomed vessels. With such a large and well equipped navy, I would imagine that we have some extant accounts of the battles the Ming fleet participated in. I'm looking for both period accounts and modern scholarship on the role played by the Ming fleet 1592-1598. Help would be appreciated.