Did you come to Caota Town, Zhuji City to change the lock and unlock it?

Did Caota Town, Zhuji City go to the door to change the lock and unlock it? The lock is usually unlocked by an individual, and the security room in many communities also has a lock phone. . .

And there are some small advertisements posted on the stairwell of the old building to unlock the phone; There are also small advertisements for unlocking mobile phones on some advertising columns in backstreet.

Some elevators even have telephones on their doors. (There is a telephone above the elevator door in my community)

Because unlocking is a personal matter, small advertisements are usually posted everywhere.