Used to describe something that is uncomplicated or straightforward. It can refer to the quality of being simple in design, execution, or understanding.

Used to refer to written communications, such as letters or notes sent between people. This meaning emphasizes the physical aspect of written texts.

Refers to the materials used for writing in ancient times, particularly in Chinese history, where bamboo strips were commonly used for recording texts.

In this context, it pertains to the modern form of Chinese characters that have been simplified for easier writing and reading, widely used in mainland China.