Huawei announced an event at MWC 2019 (February 24th), with the slogan "Are you ready to reveal the unprecedented?".
From the looks of that image, and from previous Huawei statements, is is likely that Huawei will unveil its first foldable OLED devices at the event.
Huawei's original target was to unveil its foldable device in November 2018. Reports suggest that Huawei's foldable OLED supplier is BOE Display, even though some early rumors suggested that Huawei's supplier is LG Display.