All Olympic anti-doping centers go into operation

Beijing's 41 anti-doping centers are preparing for an unprecedented number of tests.

As of Sunday, China's 41 anti-doping centers, 34 located in Beijing and 7 in the co-host cities, went into operation.

Beijing's 41 anti-doping centers are preparing for an unprecedented number of tests.

With the most equipment in the Games history, anti-doping facilities for the Beijing Olympics are the biggest and most up-to date in the world.

The centers are under strict security. Only those holding a special pass are allowed to enter.

This year 4,500 tests will be conducted, nearly 1000 more than Athens'. The top five athletes in each event will receive tests. Of these, about 800 will be urine detection and 900 will be from blood tests.

New rules set by the IOC specify that an athlete may be tested several times in one day. Missing two separate tests during the Games will be considered a violation of anti-doping rules.