| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:17.10 | MAC Jingle Bell | 2025-12-12 |
| 100m Breaststroke | 1:19.81 | Border City Invitational 2025 | 2025-12-05 |
| 100m Butterfly | 1:13.85 | Border City Invitational 2025 | 2025-12-05 |
| 100m Freestyle | 1:06.22 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 100m IM | 1:15.41 | MAC Fall Fest Invitational | 2025-10-18 |
| 1500m Freestyle | 3:29.80 | MAC Jingle Bell | 2025-12-12 |
| 200m Backstroke | 2:51.02 | MAC Fall Fest Invitational | 2025-10-18 |
| 200m Breaststroke | 2:51.41 | Border City Invitational 2025 | 2025-12-05 |
| 200m Butterfly | 2:50.94 | MAC Jingle Bell | 2025-12-12 |
| 200m Freestyle | 2:25.36 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 200m IM | 2:34.89 | Border City Invitational 2025 | 2025-12-05 |
| 400m Freestyle | 5:07.74 | MAC Fall Fest Invitational | 2025-10-18 |
| 400m IM | 5:42.62 | Border City Invitational 2025 | 2025-12-05 |
| 50m Backstroke | 36.45 | MAC Jingle Bell | 2025-12-12 |
| 50m Breaststroke | 37.28 | Border City Invitational 2025 | 2025-12-05 |
| 50m Butterfly | 33.92 | MAC Fall Fest Invitational | 2025-10-18 |
| 50m Freestyle | 30.95 | MAC Jingle Bell | 2025-12-12 |
| 800m Freestyle | 10:38.32 | Gus Ryder Memorial Cup 2025 | 2025-11-07 |
Chen, Siyu's top personal bests include 100m Backstroke (1:17.10), 100m Breaststroke (1:19.81), 100m Butterfly (1:13.85), 100m Freestyle (1:06.22), 100m IM (1:15.41).
Chen, Siyu swims for Markham Aquatic Club.
Chen, Siyu has competed in 9 meets.