| HTML Entity (dec) | 難 |
| HTML Entity (hex) | 難 |
| UTF-8 (hex) | 0xefa9a8 / 0xef 0xa9 0xa8 (3 bytes) |
| UTF-8 (dec) | 239, 169, 168 (3 bytes) |
| UTF-16-BE (hex) | 0xfa68 / 0xfa 0x68 (2 bytes) |
| UTF-16-BE (dec) | 250, 104 (2 bytes) |
| UTF-32-BE (hex) | 0xfa68 / 0x00 0x00 0xfa 0x68 (4 bytes) |
| UTF-32-BE (dec) | 0, 0, 250, 104 (4 bytes) |
| C/C++/Java source code | "\ufa68" |
| Python source code | "\ufa68" |