What's the use of the sun and moon in the input method?

The sun and moon in the input method were usually used as special symbols or marks to represent some specific characters or words. In some web novels, the sun and moon could be used as a metaphor or symbol to represent positive concepts such as strength, courage, hope, and light. For example, in some novels, the sun and the moon may be used as symbols to represent the protagonist's spiritual qualities or personality traits. Or the sun and the moon could also be used as symbols to hint at the development and change of the story. The sun and moon in the input method could also be used to quickly find specific characters or words when typing. For example, if you need to type the word "good night", you can use the sun symbol "O" to represent the word and then look up the word "good night" in the input method.