Nan-Yong (徐南永) Xu
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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.
35
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
36,9%
Rank quotient ?This runner's calculation uses 15 eligible race(s): Σ(rank − 1) = 3 407; Σ finishers = 9 223. 3 407 / 9 223 × 100 = 36.94%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed15
Km — ultra races1 557 km
> 100 km7
> 160 km4
Longest race175,0 km
1st Chiangmai Thailand by UTMB - TRANS-INT 160 — 6/12/2024
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Trail100,0%
HISTORY
15 race(s)| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 6/12/2024 | 1st Chiangmai Thailand by UTMB - TRANS-INT 160 | 175,00 | ×5 |
| ✓ 2 | 7/7/2023 | 7th Columbia 168 Ultra Trail Chongli Challenge Race | 168,00 | ×4 |
| ✓ 3 | 5/12/2025 | 2nd Chiangmai Thailand by UTMB - CHIANG DAO 100 | 160,93 | ×4 |
| ✓ 4 | 10/11/2023 | 8th Jiangnan 100 Ultra Trail - 100mi | 160,93 | ×4 |
| ✓ 5 | 19/10/2024 | 10th Ninghai Ultra Trail - 100km | 106,00 | ×3 |
| ✓ 6 | 1/11/2025 | 10th Ultimate Tsaigu Trail Kuocang - 105 km | 105,00 | ×3 |
| ✓ 7 | 22/4/2023 | 2nd The Ultra-Trail Huizhou - 100 | 105,00 | ×3 |
| ✓ 8 | 31/5/2025 | 3rd Weihai Ultra Trail 100km | 100,00 | ×2 |
| ✓ 9 | 14/10/2023 | 5th Jiangnan Skyrace - 100 km | 100,00 | ×2 |
| ✓ 10 | 2/11/2024 | 9th Ultimate Tsaigu Trail Kuocang - 105 km | 95,00 | ×2 |
| ✓ 11 | 31/3/2024 | 3rd Welnig Golden Coast Run | 70,00 | ×2 |
| ✓ 12 | 2/9/2023 | 7th Trail Mt Wugong 50 km | 56,00 | ×1 |
| ✓ 13 | 28/10/2023 | 8th Ultimate Tsaigu Trail Kuocang - 55 km | 55,00 | ×1 |
| ✓ 14 | 10/11/2024 | 7th China 100 mountain cross - 50 km Ningbo | 50,00 | ×1 |