An upper character to match the initial consonant, and a lower character to rhyme with the final sounds, including the tone.

上字表示声母，下字表示包括声调在内的韵母。

With this quit. You could also call this upper and then type quit in upper case. It's about our personal preference in this demo I'm going to use lower case characters.

有了这个退出。您也可以将其称为 upper，然后以大写形式键入 quit。这是关于我们在这个演示中的个人偏好，我将使用小写字符。