Under normal circumstances, Unicom's business outlets are all available, and the mobile ones are definitely not.

I know a few points:

Central District: Opposite to Ermian, Qingtan Road.

China Unicom business hall is 300 meters east of the intersection of Guangming Road and Jianshe Road.

Xuecheng District: Unicom Business Hall of Post Office

Linshan Park also has it, but it seems to charge 1 yuan.