Competitor bio:

Tianyi, a 16-year-old student from Beijing, started his running journey while living in Canada from age 7 to 10. During that time, he completed an impressive 49 races, including 5Ks, 10Ks, half marathons, and two full marathons: the first in 3 hours and 47 minutes at age 9, and the second in 4 hours and 2 minutes at age 10. After returning to China, Tianyi took a break from racing but resumed in 2024, completing 10 half marathons to prepare for the 777 challenge.