People · China
Zhenyu Cai (蔡镇宇)
5×5 · top 0.16% of 41,402 all-time · competing since August 2019 · 2019CAIZ05
Zhenyu Cai (蔡镇宇) has been competing for 7 years. His best event is the 5×5: a personal-best single of 39.71, set at Guilin Open 2026, puts him in the top 0.16% of the 41,402 people who have ever been ranked in the event, and 9th in China. Until July 2017, no official 5×5 solve in the world had been that fast. Across 17 competitions since August 2019, he has put 466 official solves on the record across eleven events. Solve to solve, his 3×3 times vary about 13% around a typical one, steadier than 50% of the 36,406 competitors with ten or more counted rounds. His 4×4 best has come down from 41.36 in August 2019 to 24.71, a 40% improvement. Zhenyu has entered 17 competitions, more competitions than 96% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | China | |
|---|---|---|---|---|---|
| 5×5 | 39.71 | 49.80 | top 0.16% | 9 / 2,857 | |
| 4×4 | 24.71 | 27.31 | top 0.64% | 66 / 5,999 | |
| Megaminx | 36.99 | 38.85 | top 0.94% | 20 / 1,693 | |
| 3×3 | 6.63 | 8.78 | top 0.97% | 371 / 28,499 | |
| 6×6 | 1:38.58 | 1:45.37 | top 3.7% | 69 / 1,363 | |
| 3×3 one-handed | 13.16 | 14.81 | top 4.7% | 432 / 5,994 | |
| 7×7 | 2:44.72 | 2:52.41 | top 6.6% | 138 / 1,274 | |
| 2×2 | 2.26 | 3.26 | top 6.7% | 966 / 15,939 | |
| Pyraminx | 4.23 | 7.23 | top 8.8% | 1,076 / 10,269 | |
| Clock | 7.74 | 17.67 | top 13.8% | 307 / 1,887 | |
| Square-1 | 18.65 | 23.75 | top 24.9% | 426 / 1,373 |
Percentile against all competitors ever ranked in each event, a fairer measure than raw rank, because the pools differ by a factor of ten.
The line so far
Best single per competition, 4×4. Faster is higher — the axis is the right way up.
The story so far
- 20 Jun 2026Three personal bests in one day at Guangzhou Big Cubes 2026.
- 14 Mar 2026Three personal bests in one day at Zhuhai Pi Day 2026.
- 21 Dec 2025Three personal bests in one day at Guangzhou Big Cubes 2025.
- 9 Nov 2025Three personal bests in one day at Guangzhou Small Cubes 2025.
- 8 Nov 2025Five personal bests in one day at Guangzhou Special 2025.
- 19 Oct 2025Four personal bests in one day at Guilin Open 2025.
Competitions
- Guilin Open 2026 · 18 Oct 2026 — 1 personal best set
- Zhanjiang Open 2026 · 9 Aug 2026
- Maoming Open 2026 · 8 Aug 2026 — 1 personal best set
- Guangzhou Big Cubes 2026 · 20 Jun 2026 — 3 personal bests set
- Liuzhou Open 2026 · 24 May 2026 — 1 personal best set
- Foshan Open 2026 · 2 May 2026 — 2 personal bests set
- Zhuhai Pi Day 2026 · 14 Mar 2026 — 3 personal bests set
- Canton Countdown 2025 · 31 Dec 2025 — 2 personal bests set
- Guangzhou Big Cubes 2025 · 21 Dec 2025 — 3 personal bests set
- Guangzhou Small Cubes 2025 · 9 Nov 2025 — 3 personal bests set
- Guangzhou Special 2025 · 8 Nov 2025 — 5 personal bests set
- Guilin Open 2025 · 19 Oct 2025 — 4 personal bests set
- Jiangmen Open 2025 · 24 Aug 2025 — 2 personal bests set
- Jieyang Good Afternoon 2021 · 31 Jan 2021 — 2 personal bests set
- Jieyang Winter 2020 · 19 Jan 2020 — 2 personal bests set
- Zhongshan NxN Speedcubing 2019 · 27 Oct 2019 — 3 personal bests set
- Jieyang Open 2019 · 11 Aug 2019
Reading this page: a single is one solve's time · an average is the middle three of five solves, best and worst discarded · a PB is a personal best · a DNF (did not finish) is an attempt with no valid result: a popped piece, an unsolved face, an over-limit memorisation · top X% compares against everyone ever ranked in that event, which is fairer than raw rank because event pools differ tenfold.
The circuit
The people whose scorecards keep turning up next to his.
- Zijian Cai (蔡子健) — met in 74 rounds, finished ahead twice · head to head
- Yuchong Liu (刘雨翀) — met in 51 rounds, finished ahead 42 times
- Weicheng Luo (罗炜城) — met in 47 rounds, finished ahead 40 times
Next targets
- A sub-30 5×5 single — 1 people have one; it is 9.71 away.
- A sub-20 4×4 single — 46 people have one; it is 4.71 away.
Targets move as he improves.