-The number of bytes consumed is relatively small.
-Code that can be read on domestic mobile phones.
It is garbled by how to use it.
Since encoded data often contains control characters, they may malfunction or be garbled in environments where they are not assumed.
The character type is about 9000.
The character range is wide and the characters of any contry can not be garbled.
It can be read by default in almost any PC environment.