Code point
U+300C
Glyph appearance depends on your fonts.
U+300C
PsU+300C LEFT CORNER BRACKET is a Unicode 16.0.0 character in the Open Punctuation category. It belongs to the CJK Symbols and Punctuation block.
Choose the representation you need, then copy its value.
U+300C
12300
「
「
E3 80 8C
300C
0000300C
%E3%80%8C
\u300C
\u300C
\u300C
\300C