Is it legal for the security guard to ask his family to cover the shift?

The personnel on duty are not allowed to call their families or children to replace them, and can only adjust each other within the security personnel. Security personnel have the right to put forward opinions on those who leave collective property in disorder, and properly clean it up and report it to the foreman for handling. They have no right to give materials and other collective property to others, let alone engage in personal fraud.

Irresponsible work, dereliction of duty, resulting in losses to the collective property, according to the specific circumstances to give economic sanctions and disciplinary sanctions. Foreigners must hold valid identity documents, register in the guard room, and enter after approval.

Employee replacement must be approved by the employer.

The employee's post is stipulated in the labor contract and should be performed by himself according to the contract. Colleagues who use their rest time as agents shall obtain the consent of the employees. The employer shall not recognize the situation of changing classes without authorization. If someone has provisions on substitute classes in the rules and regulations I have formulated according to law, they should abide by them.