Edit your Chinese user dictionary on Mac
You can add and remove words from your user dictionary. To use a word you added, just type its code.
The following input sources support this functionality: Pinyin - Simplified, Shaungpin - Simplified, Pinyin - Traditional, Shuangpin - Traditional, Zhuyin, and Zhuyin - Eten.
On your Mac, click the Input menu in the menu bar, then choose Edit Text Substitutions.
The Text pane of Keyboard preferences is displayed. You can also open the Text pane by choosing Apple menu
> System Preferences, clicking Keyboard, then clicking Text.Click the Add button
. In the Replace field, enter the word you want to add to the user dictionary, then in the With field, enter the text substitution.
To remove a word you added, select it in the list, then click the Remove button 
.
When you’re signed in to iCloud on your Mac and other devices using the same Apple ID, your user dictionary is automatically updated and available on all your devices. To see your dictionary on iOS devices, go to Settings > General > Keyboard > Text Replacement.