Certain traditional characters have more than one standard form. Here are some examples. This book uses the characters in the first column. An overview of the origin, structure, and systems of Chinese characters is presented in Chapter 3.
| 裏 | 裡 | lǐ |
| 著 | 着 | zhè |
| 叫 | 呌 | jiào |
| 為 | 爲 | wèi |
In addition, the word zuò when used as the verb ‘do’ can be written as 做 or 作. This book uses the form 做. In compounds such as 工作 gōngzuò ‘work,’ zuò is written as 作.