Chang-Jian (秦昶建) Qin
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11
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
25
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
59,1%
Rank quotient ?This runner's calculation uses 11 eligible race(s): Σ(rank − 1) = 1 191; Σ finishers = 2 015. 1 191 / 2 015 × 100 = 59.11%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed11
Km — ultra races763 km
> 100 km1
> 24h1
Longest race149,0 km
1st Hangzhou ultramarathon 24H race — 9/12/2017
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road53,1%
Trail46,9%
HISTORY
11 race(s) · 5 split(s) nested| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 9/12/2017 | 1st Hangzhou ultramarathon 24H race | 148,98 | ×5 |
| ✓ 2 | 12/3/2016 | 3rd Wendao Ultra Trail HZ100 - 100 km | 100,00 | ×4 |
| ✓ 3 | 23/2/2019 | 4th Lian Island 12 Hours Ultra Marathon | 78,75 | ×3 |
| ✓ 4 | 17/3/2018 | 3rd Lian Island 12 Hours Ultra Marathon | 67,50 | ×2 |
| ✓ 5 | 31/3/2019 | 3rd Shanghai 10 Hours Ultra Marathon | 60,32 | ×2 |
| ✓ 6 | 8/7/2017 | 2nd Taiyuan Ultra Trail - Dragon 60 km | 60,00 | ×2 |
| ✓ 7 | 19/5/2018 | 3rd Beijing 100 Baoshan Trail - 50km | 50,00 | ×2 |
| ✓ 8 | 30/4/2018 | 2nd Shanghai 10 Hours Ultra Marathon | 50,00 | ×2 |
| ✓ 9 | 26/3/2017 | 2nd Wuxi Trail Race - Spring | 50,00 | ×2 |
| ✓ 10 | 4/3/2017 | 1st Nanjing Laoshan National Forest Park 50 Cross | 50,00 | ×2 |
| ✓ 11 | 4/3/2018 | 2nd Nanjing Laoshan National Forest Park 50 Cross | 47,90 | ×1 |