In the thrilling men's 4x100 relays event at the world championships, a US disqualification sees China go from bronze to silver in a historic race.
More than 2,800 volunteers, mostly college students, will provide services to athletes, audience members and media for the IAAF World Championships Beijing 2015, according to the organizing committee.
By sending its largest team to the IAAF World Championships, which will open on Aug 22 in the capital, the team is hoping for breakthroughs.
The 15th IAAF Athletics World Championships will be held in Beijing from August 22-30.
China's Olympic champion hurdler Liu Xiang is still training in the hope of competing at the 2015 IAAF World Championships despite the long absence from the track.
Chinese hurdler Xie Wenjun claimed his second IAAF event title in less than a week when he clocked a fastest time of 13.31 seconds in the men's 110m hurdles at the 2014 IAAF World Challenge Beijing meet here on Wednesday.
China's track and field governing body organized an anti-doping exam for all its athletes here on Thursday, one day prior to the kick-off of the athletics competitions at the ongoing 12th National Games.
Jamaica's Usain Bolt and Fraser-Pryce gave track and field just the boost it needed at the IAAF worlds after the sport's credibility was questioned.
Usain Bolt is undoubtedly the biggest name in world sport. But unless someone emerges who can realistically challenge his hegemony, the majestic Jamaican might begin to lose some of his stardust.
A few zigzag moves near the end secured the men's marathon gold medal for Stephen Kiprotich.
Shelly-Ann Fraser-Pryce may not be a crowd pleaser or have the records of fellow sprint champion Usain Bolt but her battle to rise out of poverty to become queen of women's sprinting says a lot about a champion's drive and mental strength.
Mo Farah overcame a crippling early stitch to defend his world 5,000m title and claim a rare world and Olympic double in the long-distance events.