Olympic athlete from Russia Alexander Bolshunov crosses the finishing line during men's 50km mass start classic of cross-country skiing at the 2018 PyeongChang Winter Olympic Games at Alpensia Cross-Country Skiing Centre, PyeongChang, South Korea, Feb. 24, 2018. Alexander Bolshunov won the silver medal in a time of 2:08:40.8. (Xinhua/Fei Maohua)