Lu stressed the "smoothest communication and cooperation between the host city and the IOC in the Olympic history" during Beijing's preparation for the 2008 Summer Olympics.

IOC member Yang Yang, who is China's first ever winter Olympic gold winner, said on Wednesday that the bid committee was busy preparing to host IOC inspectors.

"Our bid is in line with the IOC's 2020 Agenda," said Yang Yang, who declined to predict Beijing's chance.

Former NBA player Yao Ming, a promotion ambassador of the 2022 bid, said Beijing's infrastructure and experience as a 2008 host made it "a prime candidate".

Shen Xue, a former Olympic champion and one of six bid ambassadors, said on Wednesday: "I believe Beijing will do its best to win the hosting right. I am eagerly waiting for Beijing to be the first city in history to host both the summer and winter Olympics."

Beijing handed over its official bid to IOC last month, promising to deliver an "athletes-centered, sustainable and economical" Olympics.

IOC president Thomas Bach had said that Beijing's vision complied with IOC's reforms.

In the report, Beijing stressed athletes will be put at the center of the Games.