Tournament Record - Si Jiahui In World Under-21 Championship - Men
| Played | Winner | Final | Semi-final | Quarter-final | Last 16 | Last 32 | Prize Money | Centuries |
|---|---|---|---|---|---|---|---|---|
| 1 | 0 | 4 | 4 | 10 | 10 | 28 | 0 | 0 |
| Tournament | Finish | Prize Money (GBP) |
|---|---|---|
 2018 World Under-21 Championship - Men |
Group 11 | 0 |