One of the most popular tourist destinations in the world, with about 140 million Chinese tourists and 4.4 million international visitors in a year. With a history of more than 3,000 years, Beijing has been an integral part of China's history. It is one of the Four Great Ancient Capitals of China, offering China's most wonderful array of attractions; Great Wall of China, Forbidden City, Tiananmen Square. No other city in the nation attracts more travelers. Continental monsoon; Autumn is the best time to be in Beijing; the temperature is mild and the sun is out a lot. The temperature in spring is nice, too, but it is very dry and winds whip sand around the city.