The Chinese Language
Standard Chinese, the language you are going to learn in China, often called Mandarin, is the official standard language of China and Taiwan, and one of the four official languages of Singapore (where it is called "Huayu" 华语 or simply Chinese). Standard Chinese is based on the Beijing dialect, the dialect of Mandarin as spoken in Beijing. The governments of both China and Taiwan intend for speakers of all Chinese speech varieties to use it as a common language of communication. Therefore, it is used in government agencies, in the media, and as a language of instruction in schools.
In mainland China and Taiwan, diglossia has been a common feature. For example, in addition to Standard Chinese, a resident of Shanghai might speak Shanghainese; and, if he or she grew up elsewhere, then he or she is also likely to be fluent in the particular dialect of that local area. A native of Guangzhou may speak both Cantonese and Standard Chinese. In addition to Mandarin, most Taiwanese also speak Minnan, Hakka. A Taiwanese may commonly mix pronunciations, phrases, and words from Mandarin and other Taiwanese languages, and this mixture is considered normal in daily or informal speech.