1.3 million square meters residential property should be equipped with how many security guards?

There are 4 people at the gate, 2 people on patrol, 3 people on duty in the central control room or fire control room, 2 people to maintain vehicle order, security manager 1 person, night shift manager 1 person. Probably need 15 people.

If the security manager and the night shift manager are allowed to work part-time in the central control, three people on duty in the central control can be removed, at least 12.