one-fifth of the world’s population—1.3 billion people—live in China. More than 90 percent of these are ethnic Han Chinese, but China also recognizes 55 national minorities, including Tibetans, Mongols, Uighurs, Zhuang, Miao, Yi, and many smaller groups. Even among the ethnic Han, there are regional linguistic differences. Although a common language called Putonghua is taught in schools and used by the mass media, local spoken languages are often mutually incomprehensible. However, the logographic writing system, which uses characters that represent words rather than pronunciation, makes it possible for all Chinese dialects to be written in the same way; this greatly aids communication across China.

China is a multinational country, with a population composed of a large number of ethnic and linguistic groups. Thus, the basic classification of the population is not so much ethnic as linguistic. The Han (Chinese), the largest group, outnumber the minority groups or minority nationalities in every province or autonomous region except Tibet and Sinkiang. The Han, therefore, form the great homogeneous mass of the Chinese people, sharing the same culture, the same traditions, and the same written language. Some 55 minority groups are spread over approximately three-fifths of the total area of the country. Where these minority groups are found in large numbers, they have been given some semblance of autonomy and self-government; autonomous regions of several types have been established on the basis of the geographic distribution of nationalities.