Amazfit has announced that it's ready for the TWS earbud market in 2020. To this end, it has revealed 2 new products in this category: the PowerBuds and ZenBuds. The former are sports-focused, whereas the latter have been designed by their OEM to help relieve stress and improve sleep quality.
https://www.notebookcheck.net/Amazfit-unveils-its-PowerBuds-and-ZenBuds.449765.0.html