A grand post station built in the previous dynasty, located beneath the Yanxing Mountains at the border of Tanzhou and the capital. Expanded several times, it serves as a lodging place for officials and military couriers traveling south from Tanzhou, Youzhou, and Suzou. It contains warehouses, inn buildings, Minghua Hall, lodging quarters, stables, warehouses, a watering pool, and a drum tower. The crime scene is in the east chamber of the lodging quarters.
