Undefined Character (U+3100)

Block:	Bopomofo, U+3100 - U+312F^[1]
Plane:	Basic Multilingual Plane, U+0000 - U+FFFF^[1]
HTML Entity:	`㄀` `㄀`
UTF-8 Encoding:	`0xE3 0x84 0x80`
UTF-16 Encoding:	`0x3100`
UTF-32 Encoding:	`0x00003100`

References