Never shy in the size of their teams the Australian Olympic team is around 433 athletes which no doubt will be one of the biggest competing.
In the info i found it said there was 433 Australians competing
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Natalie cook
China has 396 athletes competing in 23 sports; equestrianism, football and handball are the only sports for which China has no representation in the 2012 Olympics.
Over 630
596 (per another Wiki answer)
There are a total of 380 competitors in 23 sports competing for China at the 2012 Summer Olympics.
There are more than 4 million of tourists visiting The Great Wall each year. I'm not sure how many Australians do though.
china
639 Chinese athletes competing in the 29th Olympiad hosted by China in Beijing!
There are about 385 athletes from China not including those from Hong Kong.
Australia was represented by a team of 410 athletes and competed in 23 sports winning 9 gold 16 silver and 12 bronze medals