Hello, has the company signed it? You should discuss it with the company first. Generally, the company organizes a physical examination to get a health certificate.

It was done at the entry-exit health and quarantine bureau, and yellow fever vaccine and cholera vaccine should be given after physical examination (another certificate).

I think it is impossible to handle it at a general health and quarantine station for the first time ... because I am going abroad, I can't just go to the hospital. It's the same reason that you can't get a passport at a small local police station.