Children learn to make a cloth-ball filled with coarse cereals under the guidance of a teacher during an activity marking the day of Li Xia in Binzhou city, east China's Shandong province, May 5, 2015. Tuesday is "Li Xia" which marks the beginning of summer in Chinese Lunar calendar. People, especially the kids, knock boiled eggs with each others to celebrate. The winners will be the ones whose eggs remain flawless after knocking. [Photo/Xinhua]