A post made by the Xiaomi Company on Weibo has increased the likelihood of the Mi Mix 4 being released this year. Although no specs or images of the successor to the innovative Mi Mix line are presented, it does seem likely that the company CEO himself is almost ready to announce the Xiaomi Mi Mix 4.
https://www.notebookcheck.net/Xiaomi-teaser-suggests-imminent-Mi-Mix-4-announcement-with-2021-release-date-increasingly-likely.518569.0.html