History - 历史 (Lìshǐ)
The present divisions of the Chinese language developed out of the different ways in which dialects of Old Chinese and Middle Chinese evolved.
Most Chinese living in northern and south-western China are native speakers of a dialect of Mandarin. The prevalence of this linguistic homogeneity in northern China is largely the result of geography: much of northern China is covered by plains and is flat. In contrast to this, the mountains and rivers of southern China have promoted linguistic diversity.
Chronologically, there is no clear line to mark where Middle Chinese ends and Mandarin begins; however, the Zhōngyuán Yīnyùn (中原音韵), a rhyme book from the Yuan Dynasty, is widely regarded as a milestone in the history of Mandarin. In this rhyme book we see many characteristic features of Mandarin, such as the reduction and disappearance of final stop consonants and the reorganization of the Middle Chinese tones.
Until the mid-20th century, most Chinese people living in southern China spoke only their local language. Beijing Mandarin became dominant during the Manchu-ruling Qing Dynasty, and from the 17th century onward, the empire established orthoepy academies (simplified Chinese: 正音书院; traditional Chinese: 正音書院; pinyin: Zhèngyīn Shūyuàn) in an attempt to make local pronunciations conform to the Beijing standard so that the Emperor could communicate with all officials directly. These attempts, however, had little success.
Zhongguo Guanhua (中國官話), or Medii Regni Communis Loquela ("Middle Kingdom's Common Speech"), used on the frontispiece of an early Chinese grammar published by Étienne Fourmont(with Arcadio Huang) in 1742.
This situation changed with the widespread introduction of Standard Mandarin as the national language, to be used in education, the media, and formal situations in both the PRC and the ROC (but not in Hong Kong). As a result, Standard Mandarin can now be spoken intelligibly as a second language by most younger people in Mainland China and Taiwan, with various regional accents. In Hong Kong and Macau, because of their colonial and linguistic history, the language of education, the media, formal speech and everyday life remains the local Cantonese, although Standard Mandarin is very influential now.
Source: wikipedia
