Unicode 特殊字符集 ♘ 𝑤 𝑄 𝓓
RFC 3629: UTF-8, a transformation format of ISO 10646 https://www.rfc-editor.org/rfc/rfc3629.html
Unicode – The World Standard for Text and Emoji https://home.unicode.org/
The Unicode Standard, Version 14.0 https://www.unicode.org/charts/PDF/U2600.pdf
Unicode 14.0 Character Code Charts http://www.unicode.org/charts/
The Unicode Standard, Version 14.0 http://www.unicode.org/charts/PDF/U1D400.pdf