The 19-member commission begins visiting sites for hockey, ice skating and other events in central Beijing on Tuesday before checking proposed skiing and sliding venues further outside the city.
Beijing is competing against Almaty, Kazakhstan, and is seeking to become the first city to host both the summer and winter games.
Chinese organizers say hosting the games would raise the profile of winter sports in the world's most populous nation. Most of the proposed venues are left over from the 2008 Games, leading to significant cost savings in keeping with the IOC's Olympic Agenda 2020 goals for a more frugal, athlete-oriented games whose legacy will live on with robust sports programs and continuing use of venues.
"We have developed a highly robust games concept, founded on athlete-centered, sustainable and economical principles," Beijing Mayor Wang Anshun was quoted as saying by the bid organizing committee.
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The inspectors concluded a visit to Almaty last month, after which Kazakh organizers announced several venue changes they say will make the games more efficient and save more than USD 500 million, in a nod to the Agenda 2020 reforms.
Other key concerns include a lack of natural snow and Beijing's notorious air pollution. Pro-Tibetan and human rights groups have also urged the IOC to consider China's record of abuse of civil and political liberties and gender discrimination in making its decision, citing strengthened support for basic human rights embedded in the 2020 Agenda.
Abuses have worsened since the 2008 Games, Human Rights Watch's China Director Sophie Richardson said in a statement. President Xi Jinping has unleashed the harshest campaign against government critics in a decade, along with tightened curbs on the media, universities and legal profession, she said.