Not necessarily. According to the Ministry of Health's Detailed Rules for the Implementation of the Regulations on Hygiene Management in Public Places, people who directly serve customers in public places need to obtain health certificates. The scope of public places includes: shopping malls (shops) and bookstores refer to places with a business area of more than 300 square meters in the city.
However, some clothing sellers do not necessarily need health certificates, which depends on the regulations of the enterprise itself.
I have worked in a large shopping mall for several years, and I have never said that I want to get a health certificate, but the shopping mall organizes physical examinations for employees every year.