People · China
Dongjun Cheng (成栋俊)
7×7 · top 2.3% of 14,226 all-time · competing since April 2026 · 2026CHEN72
Dongjun Cheng (成栋俊) has been competing for 5 months. His best event is the 7×7: a personal-best single of 2:19.86, set at Deqing Big & Blind 2026, puts him in the top 2.3% of the 14,226 people who have ever been ranked in the event, and 41st in China. Until March 2017, no official 7×7 solve in the world had been that fast. Across 3 competitions since April 2026, he has put 59 official solves on the record across four events. His 7×7 best has come down from 2:38.82 in April 2026 to 2:19.86, a 12% improvement. Dongjun has entered three competitions, more competitions than 69% of everyone who has ever competed.
Standing, event by event
vs everyone ever ranked| Event | PB single | PB average | All-time standing | China | |
|---|---|---|---|---|---|
| 7×7 | 2:19.86 | 2:36.47 | top 2.3% | 41 / 1,261 | |
| 6×6 | 1:34.51 | 1:44.13 | top 2.7% | 46 / 1,349 | |
| 4×4 | 31.52 | 35.65 | top 3.8% | 374 / 5,926 | |
| 5×5 | 56.93 | 1:02.59 | top 4.1% | 193 / 2,816 |
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, 7×7. Faster is higher — the axis is the right way up.
The story so far
- 25 Apr 2026Four personal bests in one day at Deqing Big & Blind 2026.
- 11 Apr 2026First competition: Xuzhou Zenith 2026.
Competitions
- Hefei August Open 2026 · 15 Aug 2026 — 1 personal best set
- Deqing Big & Blind 2026 · 25 Apr 2026 — 4 personal bests set
- Xuzhou Zenith 2026 · 11 Apr 2026
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.
- Anyu Zhang (张安宇) — met in 16 rounds, never finished ahead
- Ziyu Wu (吴子钰) — met in 16 rounds, never finished ahead
- Yinzhi Sha (沙印志) — met in 16 rounds, never finished ahead
Next targets
- A sub-2:00 7×7 single — 83 people have one; it is 19.86 away.
- A sub-1:30 6×6 single — 336 people have one; it is 4.51 away.
Targets move as he improves.