1. Modify the trademark to make it distinctive;
2. The trademark is approved for registration through the back door without any modification;
From what you read between the lines, it can be seen that you don't want to modify the trademark. In this case, it is difficult to be approved for registration even if it is related to the back door. Such a trademark touches the legal red line and the trademark is unstable. Even if it is successfully registered, it will be invalid. Therefore, it is suggested to modify the trademark registration.