A reliable leaker has published a marketing render of the Vivo Watch 2, a successor to last year's model. The Vivo Watch 2 is thought to arrive as a 42 mm watch with an OLED display, a 515 mAh battery, and an LTE modem.
https://www.notebookcheck.net/Vivo-Watch-2-marketing-render-leak-confirming-a-conventional-design.581043.0.html