Yīlāhā

Yilaha lies on the Laolai River, a tributary of the Nemer in the Nen basin. In Qing times a relay post called Yilahachi stood along the river, on an important route between the garrisons at Mergen and Heilongjiang and the lands to the south. Post households supplied transport and carried official communications along this frontier road. The valley's waters flow south to the Nemer and then west to the Nen, connecting the station country with the larger river system.