Hailang
The Hailang River flows northeast through wooded country to join the Mudan. Jurchen communities lived in its valley during the Ming period; the Jianzhou people later moved south toward the Hun and Suzi rivers. In the early Qing, the old fortified town of Ningguta was built beside the Hailang and became a frontier garrison. Flooding troubled the low-lying town, and in 1666 the general's seat moved to a new Ningguta on higher ground beside the Mudan River.