You must first obtain the applet file, and then change the suffix of the obtained file to zip. The file is usually in the downloads folder, then unzip it, and modify the config in the assets folder .json This file needs to be opened with a text editor, or opened after changing the suffix to txt. Just fill in the name in the quotation marks after petName. If you only want to change the owner’s name and keep “De Ram”, change it to zepp The nickname is fine, sports health may need to change the nickname of Xiaomi, remember to save it after modification, if the suffix is changed to txt, remember to change the suffix back to json, return to the previous folder, select 2 folders and 2 files, and save them Compress it into a zip file, open the custom tool, click on the tool, select Bluetooth or replace the installation, and select the compressed file