What Olympic Games has Australia participated in?
Australia has had representatives at every modern summer Olympic Games, although they competed as 'Australasia' in 1908 and 1912 combined with New Zealand.
Australians have won medals at every modern summer Olympics except for 1908 in St Louis.
I think the earliest that China was in the olympic games was in 1956. go search wikipedia for it and scroll down to the list of participating countries. Australia was involved in the very first of the modern Olympic games in 1896 (although this is a debatable point). They have participated in every Olympics since, one of only a couple of countries to do so.
Five countries - Australia, France, Great Britain, Greece, and Switzerland - have been represented at all Summer Olympic Games. Greece is the only one to have participated under its own flag in all Games. France did not send a team to the 1904 games. One Frenchman competed, for the US and a mixed team.