https://www.cnet.com/news/huawei-mate-x-foldable-phone-appears-to-be-a-thing-at-mwc-2019/

It seems that like the Galaxy Fold, the Mate X will open up from a phone-size gizmo to become more of a tablet-size device. But unlike the Galaxy Fold, the Mate X's larger screen appears to wrap around the outside of the gadget, instead of being enclosed like a spread in a magazine.

The ostensible advertisement also touts the Mate X as a 5G device.