I have moderate anemia, and the company asked me to renew my health certificate, but I have to draw blood. Can I not draw blood? My last health certificate just expired.

It is impossible not to draw blood, and the unit is also responsible for you. Moderate anemia is quite serious. If you are uncomfortable at work, you will feel dizzy or something, and then you will be bad. I suggest you take care of yourself and get a health certificate. After all, health is your own business. No matter how rich you are, you will become poor when you are sick.