Aerial photo taken on Nov. 12, 2020 shows students playing basketball during a class break at the Dong'gaobu primary school in Qingdao, east China's Shandong Province. In recent years, the school has carried out various sports activities during longer class breaks as a way to help students relax and improve their physical conditions. (Photo by Liang Xiaopeng/Xinhua)

Students take part in the rope skipping game during a class break at the Dong'gaobu primary school in Qingdao, east China's Shandong Province, Nov. 12, 2020. In recent years, the school has carried out various sports activities during longer class breaks as a way to help students relax and improve their physical conditions. (Photo by Liang Xiaopeng/Xinhua)

Aerial photo taken on Nov. 12, 2020 shows students playing table tennis during a class break at the Dong'gaobu primary school in Qingdao, east China's Shandong Province. In recent years, the school has carried out various sports activities during longer class breaks as a way to help students relax and improve their physical conditions. (Photo by Liang Xiaopeng/Xinhua)

Students take part in the tug-of-war game during a class break at the Dong'gaobu primary school in Qingdao, east China's Shandong Province, Nov. 12, 2020. In recent years, the school has carried out various sports activities during longer class breaks as a way to help students relax and improve their physical conditions. (Photo by Liang Xiaopeng/Xinhua)