When using certain Chinese or Japanese keyboards, you can create a shortcut for word and
input pairs. The shortcut is added to the user dictionary. When you type a shortcut while using a
supported keyboard, the associated word or input pair is substituted for the shortcut. Shortcuts
are available for the following keyboards:
Chinese - Simplified (Pinyin)
Chinese - Traditional (Pinyin)
Chinese - Traditional (Zhuyin)
Turn shortcuts on or off: Go to Settings > General > Keyboard > Shortcuts.