"If he needs to be efficient, you have to be more efficient. Try to think ahead before he asks."

Wang Chaoying, a student at the University of International Business and Economics, who is volunteering as attache for the General Secretary of IAAF Essar Gabriel.

"Every smile on our faces is not just for politeness but demonstrates our confidence in China."

Yang Yu, an Arabian language major at the University of International Business and Economics, who is volunteering as attache for IAAF Vice-President Dahlan Jumaan Al Hamad.

"I do this not only because I want to be a volunteer but also because I hope that I can really help someone. "

Wang Tianqi, a student at the People's Public Security University of China, who is in charge of the volunteer team from the university at the event.

"I'd like to show off beautiful Beijing and the best image of Chinese volunteers to the guests."

Lyu Dan, a PhD student at Peking University and an IAAF World Champions volunteer who started her volunteer experience during the 2008 Olympic Games.