What is green health code|| How to get green health code for China embassy|| China border

Documents for green health code:
passport
2 visa
3 pretest report
4 vaccine certificate
5 commitment letter
6 air ticket
Submit it and wait for the green code.
1 What is green health code?
It's a permission from Chinese embassy for traveling to china if you are healthy and there is no covid infection.
2 how to get it?
First of all you must have a Chinese visa, no matter what kind of it is.
After visa you must know about your igg and igm values, if your values are normal then find a ticket and go for pre test and take a print of both igg,igm and PCR report.
There should be a gap of 21 to 28 days between flight and pretest.
After pretest try to stay home and before 48 hours of flight you have to go for post test named 48 hours test.
After finishing 48 hours test, open the link https://hrhk.cs.mfa.gov.cn/H5/ for green code application.