We already got a confirmation that Xiaomi is working on a successor to the Mi Mix, a phone that surprised many with extremely thin bezels. Like with everything, there is always a room for improvement and Xiaomi is trying to do that with the Mi Mix 2.
According to various reports, the Mi Mix 2 is expected to feature even thinner bezels with a screen-to-body ratio of 93% that will be achieved by reducing the lower bezel. Other than that, the design will pretty much stay the same, which isn’t a bad thing, but probably will have improved hardware inside.