Dewey Decimal Classification - Children's Encyclopedia (Ages 8-11) The Dewey Decimal Classification (DDC) is a system for organizing the contents of a library. It is commonly known as the Dewey Decimal System. It helps people find nonfiction books on any subject in the library.
Beijing â The Capital of China. Urban Population: 18.8 million. As the capital of China, Beijing ranks as the top on the major cities in China. Reputed as the worldâs historical city and one of the top seven ancient capitals in China, Beijing has been the capital of China since Lioa Dynasty, 800 years till now.
According to our just released Demographia World Urban Areas, Tokyo-Yokohama, the worldâs largest city, has 30 times the population of Beijing in 1800. And, Beijing itself has reached 21 million. Beijing remains one of the ten largest cities, but London with a population of 10 million ranks 32nd.