Pupils draw pictures on eggs during an activity marking the day of Li Xia in Nantong city, east China's Jiangsu 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]