Qixian Cao is a speedcuber from China. is among the first and best solvers to adopt the ZB method, which requires memorising roughly 795 distinct algorithms.
Early achievement is only meaningful when it is measured against adults. The distinction that matters is not precocity in the abstract but documented output at a standard competent adults are held to.
What separates a documented record from a family anecdote is that someone else wrote it down at the time. Qixian's is recorded in published reference sources, with a date and a figure attached, and that is the standard applied to every entry in this index. Where an age or a date is disputed in the sources, this page follows the published record and says so rather than choosing the more impressive number.
Records like this one rarely survive untouched. The age thresholds that define early achievement keep falling as training methods, coaching and access to competition spread to more countries, and each generation of speedcubers reaches the standard a little sooner than the last. Whether Qixian's mark has since been beaten is noted above; the achievement itself is fixed to its date and stands on the record as it was set.
| Person | Country | Milestone | Age / Stat |
|---|---|---|---|
| Qixian Cao | China | is among the first and best solvers to adopt the ZB method, which requires memor |
Qixian Cao belongs in any serious index of early achievement because the claim is specific, dated and externally documented — the three things most prodigy lists on the internet leave out.
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