First of all, let’s have a look what the official doc said about the Medical Report for z-visa(or work permit notice):
The Medical report, required. The list of overseas medical institutions approved by the Chinese Inspection and Quarantine Authority can be found on the website of the local embassies and consulates. A pledge regarding one’s health condition can be accepted before entering mainland China. However, certification will be required when applying for the Foreigners Work Permit.
So before you come into China, you don’t need to have the medical test, you can just let your employer make a pledge for you, to guarantee that you are health, and will let you have the medical test after come into China.
