After the collapse of the Han Dynasty, the population stayed around 50 million until the advent of the Tang Dynasty.
Under the Tang Dynasty, the population increased from 45 million to 80 million over the course of 200 years.
After an eighteen-year gap, population specialists were given a wealth of reliable, up-to-date figures on which to reconstruct past demographic patterns, measure current population conditions, and predict future population trends.
Zhuang, Manchu, Hui, Miao, Uyghurs, Yi, Tujia, Inner Mongols, Tibetan, Buyei, Dong, Yao, Korean, Bai, Hani, Li, Kazak, Dai, She, Lisu, Gelao, Lahu, Dongxiang, Va, Sui, Nakhi, Qiang, Tu, Xibe, Mulao, Kyrgyz, Daur, Jingpo, Salar, Blang, Maonan, Tajik, Pumi, Achang, Nu, Ewenki, Gin, Jino, De'ang, Uzbeks, Russian, Yugur, Bonan, Monba, Oroqen, Derung, Tatars, Hezhen, Lhoba The demographics of the People's Republic of China are identified by a large population with a relatively small youth division, which was partially a result of China's one-child policy.
China's population reached the billion mark in 1982.
When China took its first post-1949 census in 1953, the population stood at 583 million; by the fifth census in 2000, the population had more than doubled, reaching 1.2 billion.
By the sixth census in 2010, the total population had reached to 1,370,536,875, with the mainland having 1,339,724,852, Hong Kong having 7,097,600, and Macau having 552,300.
For the first time since the People's Republic of China was founded, demographers had reliable information on the size and composition of the Chinese work force.
The nation began preparing for the 1982 census in late 1976.Chinese census workers were sent to the United States and Japan to study modern census-taking techniques and automation.Computers were installed in every provincial-level unit except Tibet and were connected to a central processing system in the Beijing headquarters of the State Statistical Bureau.The census provided demographers with a set of data on China's age-sex structure, fertility and mortality rates, and population density and distribution.Information was also gathered on minority ethnic groups, urban population, and marital status.In 1982 China conducted its first population census since 1964.