People play pickleball in the National Olympic Sports Center in Beijing on August 8, 2024, the 16th National Fitness Day in China. Coincidentally falling during the Olympic Games, the theme of this year's campaign is "exercising together with the Olympics." Provinces and cities across the nation including Beijing, Shanghai, Zhejiang and Shandong held multiple themed activities, attracting sports enthusiasts to participate. Photo: Chen Tao/GT