U+FE10 PRESENTATION FORM FOR VERTICAL COMMA, or 0xA1C1 (hangyol 01-33) in KPS 9566. This character was eventually added to Unicode from GB/T 12345 and, theoretically, GB 18030. Prior to this, it was mapped to the approximate U+02BC MODIFIER LETTER APOSTROPHE, or to private use codes U+E101 (in ISO/IEC JTC 1/SC 2/WG 2 N 2056 Annex B), U+F001 or U+F101 (both of the latter are supported by fonts from Red Star OS 2.0, but not 3.0; Red Star OS 3.0 uses U+F001 for its WGL4 purpose).
Own work
Nanuun-saram