The Huawei Mate 10 brand will encompass as many as four different phones. Two of those seemingly the base Mate 10 and the Mate 10 Plus got rubber stamped by the China Compulsory Certification authority.
As part of the certification process, their charging modes were listed. The phones top out at 4.5V at 5A or 5V at 4.5A, either way thats 22.5 W of power. This matches Huaweis SuperCharge as we saw it on the Mate 9 and more recently the P10.
CCC certifies two Huawei Mate 10 models The charger for the Mate 10
The two Mate 10 versions have model numbers ALP-Al00 and ALP-TL00. Those do not yet show up on TENAA, but thats a mandatory step before the October 16 unveiling.