1. Use speech-to-text software: download a speech-to-text software that supports Cantonese conversion. Play the voice message in WeChat first, then record the Cantonese voice with the recording tool, and then convert it into text with the help of speech-to-text software.

2. Use WeChat literacy plug-ins: WeChat has some literacy plug-ins that can help convert words into Cantonese Pinyin, and then convert them into corresponding words with the help of some online Cantonese Pinyin conversion tools. For example, sogou input method has Cantonese handwriting recognition function, which can convert handwritten Cantonese into Cantonese pinyin.