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Volunteer Chen Xuanlin (front L), dressing in moscot costume, performs at the match interval of the beach volleyball event at the 2014 Nanjing Youth Olympic Games in Nanjing, capital of east China's Jiangsu Province, on August 17, 2014. According to the Local Organising Committee, there are about 20,000 volunteers, most born in the 1990s, playing different roles in spectator services, competition services, medical services, food services, IOC members services, etc. with their vigor and hospitality. (Xinhua/Ju Huanzong)