Undefined Character (U+10581)

Plane:	Supplementary Multilingual Plane, U+10000 - U+1FFFF^[1]
HTML Entity:	`𐖁` `𐖁`
UTF-8 Encoding:	`0xF0 0x90 0x96 0x81`
UTF-16 Encoding:	`0xD801 0xDD81`
UTF-32 Encoding:	`0x00010581`

References