Australia, also known as Australia, a pearl in the southern hemisphere, a country riding on the back of sheep, a country sitting on a mining car, 24 million people live on 7.6 million square kilometers of land, which is a vast and sparsely populated Australian Sydney and Melbourne often ranked in the top few most liveable cities in the world. The Great Barrier Reef and the Outer Barrier Reef are also known as the longest and most beautiful reefs, a paradise for divers, and Brisbane, the Gold Coast, the best route for group tours across Australia. The summer in Australia is the winter in Shanghai because they are in the southern hemisphere, the climate and the north. The hemisphere is the opposite, so the best season to go to Australia is December January and February, because this season is the most comfortable time to dive and swim.