Is it reasonable to apply for a health certificate during working hours in the factory?

Unreasonable.

Because employees are doing health checks, which is the basic requirement of the company's management system for all employees. This system belongs to the public behavior of the company, not the private behavior of employees.

Health certificate refers to the proof of preventive health examination, which proves that the examinee has the health quality to engage in the prescribed business. Health certificate mainly involves six diseases in five industries, which largely protects the health of employees and clients.