The authority has promised to keep an "eligible" air condition for the Olympic Games which has been a promise made by the Chinese government, adding that it will consider emergency measures by banning more cars and shutting down more factories if the air quality goes down during the games.

A man smiles after purchasing tickets for next month's Olympic Games as they went on sale on Friday at a ticket booth in Beijing July 25, 2008.[Agencies]

Beijing's organizers have also prepared for a special aircraft, satellite and radar to interfere possible rainfalls during the opening ceremony.

Spectators eager for tickets and opening ceremony

The BOCOG announced on Monday that all Olympic tickets in Beijing have been sold out, leaving few for the spectators in some co-hosting cities.

Zhang Jie, a 34-year-old doctor who lived in a community which is less than five minutes walk away from the National Stadium, told Xinhua that his family were so eager to get a ticket to the venue known as the Bird's Nest in which the opening ceremony will be held on August 8.

"As the games approaching, we can even hear the actors performing for the ceremony hailing and some fragment of the music, I can see sometimes the stadium glitters in red and blue since my building is so close to it," Mr. Zhang said.

"The streets and buildings are changing everyday as we witnessed for about seven years, I think when we see your journalists and various Olympic banners hanging on both sides of the road, the Games are coming."

The Bird's Nest, Water Cube and other venues inside and outside Beijing are pre-visited by hundreds of tourists who most of the time took pictures by using them as background views, yet, their insides have been ready for foreground showing ten days later.