LAUSANNE, Switzerland — The Beijing team who are promoting the bid for the 2022 Winter Olympics in Lausanne have vowed to host a clean Games, in terms of fair play and air quality.

A series of presentations and exhibitions have been held in a hotel adjacent to the headquarters of the International Olympic Committee (IOC).

“Sports must be free of doping and clean athletes must be protected,” said Liu Peng, head of both the Chinese Olympic Committee and State General Administration of Sport.

Liu told the 85 IOC members attending the candidate city briefings that China has a zero-tolerance policy against doping, and its WADA-accredited and world-class laboratory and experienced personnel will ensure the full success of the Games in 2022.

Beijing and its co-host Zhangjiakou, about 200 km northwest of the Chinese capital, are now competing against Almaty, Kazakhstan, for the right to host the 2022 Winter Games. With a strong economy and the rich legacy of the 2008 Summer Olympics, Beijing has been widely tipped as a favorite.

Following the briefing, presentation and exhibition on June 10 and 11, the Beijing team seem to have more confidence that they are on the right track to convince the IOC members.

“From tomorrow to the July 31 host city election, we will focus on continuing to listen to the Olympic Family, explaining the strengths of our bid and transformative mutual benefits that awarding the Games to Beijing would bring,” Wang Anshun, Beijing mayor and president of the Beijing 2022 Bid Committee, told Xinhua.

Beijing started a five-year plan to clean the air in 2013. With a total investment of $130 billion in five years, Beijing expects to cut the density of PM2.5, or harmful particles that are small enough to enter bloodstreams, by 20 percent in 2017.

“We are confident that we can have fresh air in Beijing, not only by significantly improving the air quality, but also by paving a new, healthier and greener path for the city and the surrounding region’s development for years to come,” Wang said.

According to the mayor, coal consumption in Beijing in 2017 will decrease to less than 10 million tons from 23 million in 2012.