UTF8 and Chinese conversion

1. UTF-8 is a variable-length encoding scheme used to convert Unicode characters into byte sequences.

2. UTF-8 is one of the Unicode encodings and supports all characters in UTF-16, including surrogate pairs.

3. UTF-8 is widely used in internet communications, operating systems, file storage, databases, and various programming languages.

4. UTF-8 supports nearly all characters in the world, including Chinese, Korean, and Japanese characters.