Huawei's Consumer Business head Yu Chengdong has posted the date of a new launch event on Weibo. This message also contains references to the Mate line of devices, indicating that it is to get new additions at this show. They may include the rumored MatePad Pro tablet.
https://www.notebookcheck.net/Huawei-announces-a-November-25-2019-launch-event-most-likely-for-the-MatePad-Pro.442852.0.html