What 𱔐 means
It came from a library built for rare name characters.
Unicode's Extension H proposal links 𱔐 to a special character library for China's population records. In 2015, China's Ministry of Public Security upgraded it because its system could not enter uncommon personal- and place-name characters.
China's 2018 Unicode submission says police had collected uncommon personal- and place-name characters for 65 years. It notes that most local offices still wrote them by hand, while some had developed their own fonts.
Questions people ask
1Why does 𱔐 show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type 𱔐
𱔐\31510Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.