Lane introduction: The government office is divided into three areas. There was originally a 7-meter-long screen wall in front, and there were two large archways on the east and west sides. Changhuai is an important town and very impressive. The east front line area is mainly used by the prefect to welcome guests, entertain guests, and relax; the west front line is the military arrests office and prison, which is equivalent to the current public security, court, judicial, procuratorial and other departments.