main forces himself, assisted by Zhangsun, Cen, and Yang Shidao.  In summer 645, at a major battle against the main Goguryeo forces commanded by the generals Go Yeonsu () and Go Hyezin () engaged Tang forces, Emperor Taizong had Li Shiji command 15,000 men to serve as decoy, and when Goguryeo forces attacked Li Shiji, Zhangsun Wuji attacked them from behind with 11,000 men, and Li Shiji and Zhangsun, as well as Emperor Taizong himself, defeated Goguryeo forces, forcing their surrender. He then considered directly attacking Goguryeo's capital Pyongyang itself, but Li Shiji believed that if Ansi (, in modern Anshan, Liaoning) was not captured first, the general in command of Ansi (a capable general known in Korean popular legends as Yang Manchun, although whether that wasto the recording head, and a pipe connecting the recording head, the ink room and the pump. Then, in the ink-jet printer disclosed in Japanese Laid-open Patent Publication 2005-125670, the ink in the ink circulation path circulates while preventing ink leakage from the nozzle. Accordingly, air bubbles entrapped in the recording head and in the vicinity of the recording head are removed.