Where can I set the weather pendant of oppo mobile phone?

Weather plug-in's adding method: ColorOS 12 and above: press and hold the blank space on the desktop (or close it with two fingers in the blank space), click the "+"in the upper left corner to find the weather plug-in (plug-in of tripartite weather software or clock with weather) to add to the desktop.

Coloros version 3.0- 1 1.3 system: press and hold the blank space on the desktop (or close it with two fingers), click the plug-in/card, and you can find weather plug-in (a three-party weather software plug-in or clock plug-in with weather) and add it to the desktop.

This answer applies to all OPPO models.