How to choose the door "iron general"

It can be seen from media reports and netizens' posts that recent burglary cases still occur in Liuzhou. A considerable number of cases are when thieves use the time when citizens are not at home or sleep late at night, using tools to unlock and burglary. How do citizens choose the door lock with better anti-theft performance? Class A lock, Class B lock, Super B level, these concepts are confusing.

To this end, the reporter interviewed the lock experts and experienced locksmiths, and taught everyone how to look at the keys to judge the performance of the locks. Two experts interviewed, Zhang Hongjun, senior researcher at China Unlocking Technology R&D Center, and technical consultant of China Locksmith magazine; the other is Chen Zhijin, a senior locksmith who has worked in Liuzhou for more than 20 years, and is familiar with Liuzhou people. Various types of door locks.

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