Unicode ⇄ Chinese

About Unicode:

1. Unicode is a universal character set standard covering global scripts.
2. Each character has a unique code point, regardless of language or symbol.
3. Code points range from U+0000 to U+10FFFF, covering 1,114,112 possible values.
4. Usually written in hexadecimal with the U+ prefix.
5. Programming languages use escape sequences to represent Unicode.
6. Example: in JavaScript, use \uXXXX for BMP characters.