Recently, a new machine with code-named Polaris appeared on the website of ANTUTU, which should be Mi MIX 2S. According to the data given by ANTUTU, Mi MIX 2S scored 270461 points, which is definitely with Snapdragon 845 chip.
According to the current news, the upgrade of Mi MIX 2S may be in the processor, camera and other aspects. It will be officially released on the MWC in February. Previously, Xiaomi had signed a cooperation agreement with Qualcomm, which had no worries on the processor.