How old is the security guard in Nanchong Shunqing No.7 Middle School?

Nanchong Shunqing No.7 Middle School security guard is forty or fifty years old. School security personnel are mostly experienced, aged 40 to 50, and there are also young security personnel. The age of security personnel is not clearly defined in the country, which is allowed but not prohibited, that is, there is no age limit for security work.