At the Hancheng (Seoul) meeting of early September, the decision was made to reduce the battle line and secure the main roads in order to look out for reinforcements by Ming Dynasty; Nagamasa KURODA attacked Enan-jo Castle, which was guarded by Ri Teian, but he failed to conquer it, whereupon he guarded the Shirakawa-jo and Koin-jo castles along the main roads in order to respond to attacks from the north instead of conquering the vast area of Hwanghae Province.
8月初旬の漢城会議で明の援軍を警戒して戦線を縮小して主要街道を固めることとなり、黒田長政は李廷馣の守る延安城を攻撃を行ったが攻略することが出来ず、以後黄海道の広範な制圧から転換して北方からの攻勢に対応するために主要街道沿いにある白川城・江陰城を守ることとなった。