【正确答案】Chinese language, also known as hanyu, usually refers to the standard language and its various dialects used by the Han People. It is not only the lingua franca of China, but also one of the five official working languages of the United Nations. Other main written languages in China are Tibetan, which has a history of over 1300 years, the Uygur, over 1000 years, and the Mongolian, 700 to 800 years. Recently, increasing numbers of people among the ethnic minorities are using Chinese language. Many ethnic minorities have no written scripts, so they use either the Han Chinese script or the script of a related nationality.