The OnePlus Ace is currently thought to launch as the Chinese-market version of the upcoming 10R flagship smartphone variant. The brand is currently hyping it as a device that will also debut a new kind of "supercrystalline" material for thermal management. It is tipped to help the Ace's new Dimensity-series SoC maintain performance while gaming.
https://www.notebookcheck.net/OnePlus-teases-the-Ace-in-terms-of-its-unique-cooling-system.614680.0.html