Qian-Zhao (陈前钊) Chen
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14
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
2
Countries visited ?
China
Thailand
45,8%
Rank quotient ?This runner's calculation uses 14 eligible race(s): Σ(rank − 1) = 3 614; Σ finishers = 7 898. 3 614 / 7 898 × 100 = 45.76%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed14
Km — ultra races824 km
> 100 km1
Longest race104,0 km
1st Explore the West of Dalian 100 km — 17/6/2018
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Trail100,0%
Wins & podiums (ultra)
🏆 Win2
🏆 Win M2
🏅 Top 33
🏅 Top 3 M3
Longest winning streak1
Current streak0
Records
HISTORY
14 race(s)| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 17/6/2018 | 1st Explore the West of Dalian 100 km | 104,00 | ×4 |
| ✓ 2 | 5/12/2025 | 2nd Chiangmai Thailand by UTMB - ELEPHANT 100 | 90,00 | ×3 |
| ✓ 3 | 25/10/2025 | 3rd Moganshan 65 Ultra Trail | 65,00 | ×2 |
| ✓ 4 | 8/11/2025 | 10th Wuyishan Trail Race 60 km | 60,00 | ×2 |
| ✓ 5 | 5/6/2016 | 1st Baturu Trail Mt. Guanmen 52.5km | 52,50 | ×2 |
| ✓ 6 | 20/4/2025 | 1st XianDao Lake Sky City | 52,00 | ×2 |
| ✓ 7 | 20/9/2025 | 7th Longji Ultra Trail Running Race - 50 km | 50,00 | ×2 |
| ✓ 8 | 23/8/2025 | 1st Ultra Trail YAOZHIHE | 50,00 | ×2 |
| ✓ 9 | 12/7/2025 | 9th Columbia 50 Ultra Trail Chongli Challenge Race | 50,00 | ×2 |
| ✓ 10 | 29/12/2024 | 2nd Zhiyin Jiuzhen Ultra Trail | 50,00 | ×2 |
| ✓ 11 | 27/10/2024 | 9th Tour de Huangnichuan 50k | 50,00 | ×2 |
| ✓ 12 | 22/7/2018 | 3rd Peak of Chongli Trail 50 km | 50,00 | ×2 |
| ✓ 13 | 26/11/2017 | 1st Shengzhou Trail Challenge | 50,00 | ×2 |
| ✓ 14 | 23/10/2016 | 3rd Tour de Huangnichuan 50k | 50,00 | ×2 |