I'm taking z visa. I'm iranian. I registered company in Guangzhou for taking physical examination record for foreigner, which hospital in Tehran should go?

dear sirs

I am taking z visa.i am iranian.i registered company in guangzho.

for taking physical examination record for foreigner, which hospital must go.

Is there anybody knows which hospital in tehran should go.

thanks
I went some hospitals in tehran but they cannot do all tests.