First of all, find a reliable agency (because a serious and responsible agency will inform you of the risks of trademark registration, rather than deliberately concealing the probability of trademark passing)
The trademark has a blind inspection period of 3 months; (The Trademark Office accepts tens of thousands of trademark applications every day, and it takes about 2 months from the application to the entry system, which is the blind investigation period of trademarks. )
The examiner's subjective assumptions; (Because the person who examines the trademark is not a machine, it is subjective, so this is also a major reason why the trademark is not passed. )
After the trademark has passed the examination, there will be a three-month publicity period (within these three months, anyone can raise an objection to the Trademark Office).
Trademark rejection review: Trademark rejection review refers to a method in which a trademark applicant refuses to accept the reasons given by the Trademark Office and submits a review request to the Trademark Reexamination Board. That is to say, if you don't agree with the opinions put forward by the examiner, submitting your own trademark to the reexamination board in the form of words and evidence does not constitute a formal conflict.
If you have any other questions about comments, you can write to me privately.