Xiaomi's Black Shark premium gaming brand has announced that its new, Snapdragon 888-powered flagship is to launch on March 23, 2021 in China. The 4 is slated to have improved, "360-degree, 3D" cooling, triple rear cameras and the shoulder buttons from its 3 Pro forebear. The 2 phones are also likely to have very different designs.
https://www.notebookcheck.net/Black-Shark-4-Xiaomi-s-latest-teaser-includes-a-launch-date-for-the-next-gen-gaming-phone.528364.0.html