| Event | Time | Meet | Date |
|---|---|---|---|
| 100m Backstroke | 1:18.63 | 2025 Downtown Sprint Meet | 2025-10-25 |
| 100m Breaststroke | 1:25.76 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 100m Butterfly | 1:24.65 | 2025 NYAC Cup | 2025-11-14 |
| 100m Freestyle | 1:07.39 | 2025 NYAC Cup | 2025-11-14 |
| 100m IM | 1:19.15 | 2025 Downtown Sprint Meet | 2025-10-25 |
| 200m Backstroke | 2:37.53 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 200m Breaststroke | 3:01.65 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 200m Freestyle | 2:18.55 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 200m IM | 2:40.74 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 400m Freestyle | 4:56.60 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 50m Backstroke | 37.72 | 2025 Red vs Black #1 | 2025-10-05 |
| 50m Breaststroke | 38.51 | 2026 Central Region Div 1 SC Championships | 2026-02-06 |
| 50m Butterfly | 36.89 | 2025 Red vs Black #1 | 2025-10-05 |
| 50m Freestyle | 30.35 | 2025 NYAC Cup | 2025-11-14 |
Zhang, Rex's top personal bests include 100m Backstroke (1:18.63), 100m Breaststroke (1:25.76), 100m Butterfly (1:24.65), 100m Freestyle (1:07.39), 100m IM (1:19.15).
Zhang, Rex swims for North York Aquatic Club.
Zhang, Rex has competed in 8 meets.