Xiaomi is allegedly working on 13 new smartphones, according to some snippets found within the MIUI code. Some of the devices will ship with a high-refresh-rate screen, under-display selfie camera and high-end camera modules.
https://www.notebookcheck.net/MIUI-code-reveals-screen-and-camera-specs-of-several-upcoming-Xiaomi-smartphones.547482.0.html