Xie Junyan heads a group of 72 volunteers.

　　His team is dealing with security.

　　"Our volunteers are here as an important force to ensure people's safety and security. If there are no volunteers, there wouldn't be enough security, which would allow people to come in without tickets. It could be chaos without us."

　　志愿者是田径世锦赛的重要组成部分

　　Others, including Wang Sijia, a volunteer from the China University of Mining and Technology, are less concerned about safety, and more about making those at the event feel welcome.

　　"I'm a girl who loves smiling. Being able to convey happiness to others makes me feel great."

　　Wang Sijia's fellow volunteer, Deng Yupei, is hoping to gain a little bit more practical experience from his time at the event.

　　"I've never had an experience like this before. Coming to such a big event, I'm really excited because its a whole new experience to me. I also think my time here has helped me improve my English. I've also made a lot of friends in here."

　　Two-in-Five of the volunteers at the IAAF event have been put there specifically to help the international delegations.

　　Chinese visitors to this year's event say the volunteers are just as helpful.

　　"They are very considerate. We didn't know where our seats were when we first arrived. They directed us to the seats. They're very good."

　　Outgoing IAAF President Lamine Diack has taken time to pay tribute to the volunteers, calling them "the true spirit of athletics."

　　This year's IAAF Championships run until Sunday.

　　For CRI, I'm Qi Zhi.