Qing-Dong (徐庆东) Xu
External sources
Loading FFA
Loading MV
FFA diagnostics
Run “Search / refresh FFA” to see each season, HTTP response, candidate and DUV comparison.
MarathonView diagnostics
Run “Refresh MV” to see login, session validation and parser status.
Cached locally. Empty refreshes never erase the last valid snapshot.
Born : 1992
Cat. M23 Ultrarunner since 2017
3
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
14
DUV-index+ ?Largest integer N such that the race distances provide at least N complete segments of N km in total. A single long race may therefore contribute several segments. See the DUV-Index tab for the detailed calculation. calculation details
1
Countries visited ?China
China65,9%
Rank quotient ?This runner's calculation uses 3 eligible race(s): Σ(rank − 1) = 195; Σ finishers = 296. 195 / 296 × 100 = 65.88%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed3
Km — ultra races225 km
> 24h1
Longest race100,0 km
2nd TransLaoshao 100 km Trailrunning Challenge — 28/10/2017
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road33,2%
Trail66,8%
HISTORY
3 race(s) · 3 split(s) nested| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 28/10/2017 | 2nd TransLaoshao 100 km Trailrunning Challenge | 100,00 | ×7 |
| ✓ 2 | 9/12/2017 | 1st Hangzhou ultramarathon 24H race | 74,65 | ×5 |
| ✓ 3 | 29/5/2017 | 2nd Baturu Trail Mt. Guanmen 50km | 50,00 | ×3 |