A student speaks at the closing ceremony of a workshop on China's ultrasound therapy for treating tumors in Cairo, Egypt, Aug. 14, 2018. The 14-day International Workshop on Ultrasound Therapy of Tumors was held in Cairo in cooperation with the Chinese Ministry of Science and Technology, China's Chongqing Medical University and the Egyptian Society of Interventional Radiology. (Xinhua/Meng Tao)