[Witness] "Special Occupation" series program locks crazy Lao Cao (on)

[Witness] "Special Occupation" series program locks crazy Lao Cao

Bank ATM lock is one of the most difficult locks in the world. It is difficult for ordinary people to open it without knowing the password, but Cao Qingmin only takes a few minutes. Cao Qingmin is a highly skilled locksmith who has been engaged in the lock-up profession for more than 30 years. Since the in-depth study of the ATM machine technology, Lao Cao has successfully opened more than 100 ATM machines. He went from the street locksmith of the lock booth to the unlocking teacher of the EU Lock Association, locking the tools from making a living to the things in his hands. Unremitting research and persistence have finally made Lao Cao's craft.

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