Students attend an activity to mark China's 10th Space Day in Nanjing, east China's Jiangsu Province, April 23, 2025. (Photo: China News Service/Yang Bo)

Thursday marks China's 10th Space Day.

Students attend an activity to mark China's 10th Space Day in Nanjing, east China's Jiangsu Province, April 23, 2025. (Photo: China News Service/Yang Bo)

Students attend an activity to mark China's 10th Space Day in Nanjing, east China's Jiangsu Province, April 23, 2025. (Photo: China News Service/Yang Bo)

Elementary students visit a science and technology museum to mark China's 10th Space Day in Linyi, east China's Shandong Province, April 23, 2025. (Photo: China News Service/Sun Lei)

Elementary students visit a science and technology museum to mark China's 10th Space Day in Linyi, east China's Shandong Province, April 23, 2025. (Photo: China News Service/Sun Lei)