It's safe to choose the gate lock and C level.
The national public security will advise you to choose C-level locks, so it is relatively safer to choose C-level locks for gate locks. Often read the news there will be all kinds of reports of breaking the door lock and entering the door: during the day, the owner is usually not at home and is not easy to be found. The place they choose is usually in residential buildings, factory dormitories, etc. they pretend to look for people or visit the door, knock on the door first, and test whether there are people in the home. If they are sure that there is no one in the room, they take out tools to quickly break the door lock and steal. If someone comes to open the door or has a neighbor to ask, they randomly report someone's name and ask if someone lives here. When the other party replies that there is no one, they cover with words like "I'm sorry, I knocked on the wrong door" and leave quickly. If there are too many advertising materials inserted in the door crack and handle of the household, it means that the he