No matter 3 or 4gb all Chinese versions can be convert to International now.
No need to download G converted image version and install it.
Just follow my tutorial and convert your phone easily to I version:
Important thing is version of busybox and SuperSU
You must download it from files I attached and install them.

First you need to root your chinese version pro5 by creating flyme account on setting menu.
Now you need to install “SuperSU_pro_v2.0.5.apk” (attached below)
Note: if you have Super SU installed on your phone go to settings tab of the app and click on “Reinstall” then reboot your phone and install SuperSU Pro (If you have busybox inestalled also delete the app)
Install “Seu.chainfire.supersu.256.apk” and open it and install derivers in normal way and reboot
Install “ru.meefik.busybox.apk”. Open the app and grant root access and install it.
Install “com.jrummy.root.browserfree.apk”, Open it and grant root access to it and go to [/dev/block/platform/15570000.ufs/by-name/proinfo] click on “proinfo” then “open as” then “text file” then “RB Text Editor” Change “M576_mobile_public” to “M576_intl_official” (Do not add/delete anything to those I wrote just change “mobile_public” to “intl_official” then Save it and reboot
Now check proinfo file in step 5 again and see if it’s intl_official
Congratulation you have a International version of phone now and can flash Global roms in your phone.
eu.chainfire.supersu.256.apk
com.jrummy.root.browserfree.apk
supersu_pro_v2.0.5.apk
ru.meefik.busybox.apk