Palaniappan Ganesh Ram, an Indian overseas student at Qingdao University and a volunteer of the 18th summit of the Shanghai Cooperation Organization (SCO), hands out tourist information booklets in Qingdao, east China's Shandong Province, June 8, 2018. The 18th SCO summit will be held in Qingdao on June 9-10. (Xinhua/Zhu Zheng)