Cannot synchronize contacts on Huawei Honor 8

I just acquired the new Huawei Honor 8 from China (international version), but I have a few issues with the contacts. When I synchronize the contacts from my Microsoft account, I only retrieve 16 contacts in my list (whereas I have 300+ contacts). I checked the parameters, they are not hidden, it just managed to synchronize only 16 contacts. I decided to migrate my Microsoft account contacts to my Google account, so I can try to synchronize the Google contacts on my phone. Once I managed to do it on the Google website from my computer, I found a bad surprise in the contact app : there is no option to synchronize Google contacts. HiCloud, Outlook, Facebook messenger, Linkedin, Skype and WeChat are the only options here. Have I missed something ? Do I need an extra app to do this ? I'm wondering if this issue could be related to the Chinese ROM shipped on my phone, would you recommend to install a new ROM ? **Edit** : I have installed "Google sync contacts" by directly downloading the APK. Now i can see the Google account in the list of the synchronized accounts in the contact app. But, after having double checked that the synchronization is activated for this account and a reboot, still 0 contact from Google in the list.