Ryukyu 1620: I Opened the Sea and Became Rich for the Kingdom

The soul of a modern maritime engineer travels through the Ryukyu youth in the late Ming Dynasty. He is bound to the "Wan Hai Tu Zhi" system and starts from drying salt and building ships. He stirs up the storm in East Asia and creates his own maritime empire under the blades of the Satsuma clan and Western cannons.