LEFT BLACK LENTICULAR BRACKET U+3010

BlockCJK Symbols and Punctuation
CategoryOpen Punctuation
UTF-80xE3 0x80 0x90
UTF-160xFF 0xFE 0x10 0x30
UTF-320xFF 0xFE 0x0 0x0 0x10 0x30 0x0 0x0
HTML【
Pythonu"\u3010"