Reading the Chinese embassy in Germany website it would seem, if I've read it correctly, that you can take both the PCR and IgM tests at the Medical Center situated near gate Z12 in the transit zone, then upload the results to the health app for the QR code with HDC......


http://de.china-embassy.org/det/gdxw/t1836306.htm

Starting from 1. December, 2020, all Chinese and foreign passengers who are to fly to China will be required to take nucleic acid and IgM anti-body tests and then apply at the Chinese Embassy or Consulates in Germany for a green QR-code with the “HS” mark (for chinese passengers) or a green QR-code with the “HDC” mark (for non-chinese passengers) before boarding the flight. (please upload your tests results here: https://hrhk.cs.mfa.gov.cn/H5/ )

I. The practice of allowing China-bound passengers to board the flight with only the original negativity certificates of the Frankfurt airport (Centogene, Medical Center and the testing agency in the Non-Schengen area) is terminated. Passengers flying to China who complete the tests at the Frankfurt airport must upload the negativity certificates via the Wechat mini program “Health Code International” or its web version and obtain the corresponding QR-codes (for chinese passengers QR-Code with the “HS” Mark and for Non-chinese passengers QR-Code with the HDC Mark). Passengers can be allowed on board with the original negativity certificates from both nucleic acid and IgM anti-body tests issued by the testing agency of the Frankfurt airport, as well as the corresponding QR-codes. To obtain the above-mentioned testing certificates, passengers need to complete the sampling and testing within 48 hours before boarding.