According to the "National Fitness Regulations" issued by China Sports Bureau, athletes need to show their valid athletes' cards to participate in related competitions or activities. Although not all competitions or activities will strictly require athletes to show their certificates, some important competitions or officially organized activities may check their certificates. Moreover, some local competitions or club activities may also require athletes to show their certificates to ensure the fairness and compliance of the competition. So I will check the second-level athlete's card.