The latest in the Mi Watch series of wearables has a round face and a blood-oxygen sensor. An official Xiaomi Weibo account has hinted that it is set for launch very soon in its domestic market. It is slated to come with various additional sports-focused features at this event.
https://www.notebookcheck.net/Xiaomi-teases-an-imminent-launch-for-the-SpO2-enabled-Mi-Watch-in-China.498542.0.html