Hi Krilson, I don't have any connection with GM, apart from moderating and helping out on the forum.
GM China don't appear to have "dealing with warranty related faults" very high on their list of priorities, unlike Gary (GM Canada) who does, and he always tries his best to get warranty related problems sorted as quickly as possible, but I'm guessing the controller and motor were both purchased directly from GM China, in which case you will need to deal with them direct.
Unfortunately you will have to wait and see what GM's response is, but if you are unable to get any response from GM China, perhaps Gary could try and contact them on your behalf.
Alan