Treatise on Military Preparedness (Vol. 98)

240 li a unit of distance. There are 48 patrol and combat ships of various sizes, such as the Huangying Yellow Hawk type. The river patrol officers, government soldiers, and local militia in the guarded districts total over 530 men. The upper patrol reaches Chengzi Town in Dehua County, where it meets with the officers and soldiers of the Anqing garrison.

Defensive Position of the Anqing Garrison

Along the southern bank, it begins at Madang and extends down to Chikou, measuring 290 li. Along the northern bank, it begins at Shijiagou and extends down to Laozhoutou, measuring 360 li. There are 41 ships, including patrol and cruising vessels, with over 500 officers and soldiers divided into four patrols. The upper patrol meets with the officers and soldiers of the Nanhu Mouth garrison, and the lower patrol meets with the bazong a mid-level military officer of Digang.