The fifth national population census is an important investigation of the national status and state power during the period from the end of 20th century to the beginning of the 21st century. It provides the most basic data for testing the development of Chinese population in the 20th century, and the coordination and sustainable development of Chinese population, society, economy, resources and environment in the 21st century. It has an important significance to the government to scientifically plan the development of the national economy, society, population policy, and to generally arrange people's cultural life...