| HTML Entity (dec) | 難 |
| HTML Entity (hex) | 難 |
| UTF-8 (hex) | 0xefab87 / 0xef 0xab 0x87 (3 bytes) |
| UTF-8 (dec) | 239, 171, 135 (3 bytes) |
| UTF-16-BE (hex) | 0xfac7 / 0xfa 0xc7 (2 bytes) |
| UTF-16-BE (dec) | 250, 199 (2 bytes) |
| UTF-32-BE (hex) | 0xfac7 / 0x00 0x00 0xfa 0xc7 (4 bytes) |
| UTF-32-BE (dec) | 0, 0, 250, 199 (4 bytes) |
| C/C++/Java source code | "\ufac7" |
| Python source code | "\ufac7" |