What device do you have? In order to help you without any problems, I need to know that. Please answer as soon as you can if you want to get help quickly.

Sorry for the comment below...  I forgot I was in the m2 category.  In order to do that, follow the screenshots below: (each in every comment because only one image can be uploaded in every comment)

(P.S.: Step 1: Go to the Flyme OS Chinese home page (flyme.cn) first and then proceed with the steps in the images.)

Step 3

Step 4: The 1st button is for A/Y, the 2nd is for the stable firmware and the 3rd (the large blue one) is for downloading. Unfortunately, there is no A firmware available. You have to install Y. It is also recommended to clear data for safety while transferring in order not to render your device unusable and avoid any problems. When the update window pops up telling you that in order to update you need to restart, also check the "Clear user data" option. (continues on next comment)

IMPORTANT: Make sure you have backed up any important data (contacts, videos, music, photos etc.) and settings before proceeding with upgrading because during the upgrade process it is also going to wipe all your data, apps and settings.

Also, if you want to download Flyme 5 Y,  check on the bottom of the last screenshot.

Also, why do you want to transfer from G to A/Y? Did you experience any issues with the Global version?

m2 flyme 6 global

i like the camera feature in Chinese version...global version make me hate meizu.