| HTML Entity (dec) | 开 |
| HTML Entity (hex) | 开 |
| UTF-8 (hex) | 0xe5bc80 / 0xe5 0xbc 0x80 (3 bytes) |
| UTF-8 (dec) | 229, 188, 128 (3 bytes) |
| UTF-16-BE (hex) | 0x5f00 / 0x5f 0x00 (2 bytes) |
| UTF-16-BE (dec) | 95, 0 (2 bytes) |
| UTF-32-BE (hex) | 0x5f00 / 0x00 0x00 0x5f 0x00 (4 bytes) |
| UTF-32-BE (dec) | 0, 0, 95, 0 (4 bytes) |
| C/C++/Java source code | "\u5f00" |
| Python source code | "\u5f00" |