Monday to Friday 9: 00- 17: 00. According to the business hours of Huai 'an Municipal Affairs Hall, the business hours of Huai 'an Municipal Affairs Hall are 9:00- 17:00 from Monday to Friday, and it is closed on Saturdays, Sundays and legal holidays. Huaian, formerly known as Huaiyin and Qingjiangpu. The prefecture-level cities under the jurisdiction of Jiangsu Province are located in the north-central part of Jiangsu Province and the east of Jianghuai Plain.