An amateur skier skis through the woods at a ski resort in Zhangjiakou, Hebei Province, December 12, 2020

Liu Jiayu, a young skier from Xuanhua No.2 Middle School, during training on January 3, 2021, Zhangjiakou, Hebei Province

Sun Zhifeng coaches a team of teenage snowboarders in slopestyle in Chongli Fulong Ski Resort in Zhangjiakou, Hebei Province, January 3, 2021

On January 4, 2021, after the New Year holiday, students from Xuanhua No.2 Middle School take the school bus to their training base at Chongli Fulong Ski Resort, Zhangjiakou

A teenage skier takes a tumble while practicing a 720-degree flip during training at Chongli Fulong Ski Resort, January 5, 2021

Lü Yuanxin (left) hands in his mobile phone to the team leader, January 4, 2021. Right after the New Year’s Day, the trainees of Xuanhua No.2 Middle School need to return to their training base

Coach Sun Zhifeng requires his students to continue training at night after their daily practice, January 4, 2021, Zhangjiakou, Hebei Province

Lü Yuanxin perform flips to his classmate in the apartment complex where the students stay, Zhangjiakou, January 3, 2021

Lü Yuanxin practices snowboarding in Zhangjiakou, Hebei Province, January 3, 2021. Several days before, he placed second in the Youth Snowboarding Championship of Hebei Province, which earned him a certificate for a National Second-level Athlete