Moving away from Shengtian to the east, five towns and a city away stood Hekou Town, from where further to the east was the territory of the city of Dongyun. Grass River ran through Bai Town and joined another major river here, hence the town's alternative name, "Mouth of Grass River".
The town was a long and narrow island situated at the junction of two rivers. A dam was built on the north end of the town, linking the town to the mainland. There were bridges downstream of the river, which also connected the island with the mainland.
