A placeholder name for an unspecified person, similar to "John Doe" or the first of "Tom, Dick, and Harry" when used in a series with 李四 lǐ​sì and 王五 wáng​wǔ.

Li Si; a generic name used for an unspecified person, similar to "John Doe" or the "Dick" in "Tom, Dick, and Harry".

A generic name used for an unspecified person, typically the third in a series of three; often used together with 张三 zhāng​sān and 李四 lǐ​sì to mean 'anybody' or 'Tom, Dick, and Harry'.