Standard Chinese, also known as Modern Standard Mandarin, Standard Mandarin, Modern Standard Mandarin Chinese (MSMC), or simply Mandarin, is a standard variety of Chinese that is the sole official language of China, a national language of Taiwan and one of the four official languages of Singapore. Its pronunciation is based on the Beijing dialect, its vocabulary on the Mandarin dialects, and its grammar is based on written vernacular Chinese. Like other varieties of Chinese, Standard Chinese is a tonal language with topic-prominent organization and subject–verb–object word order. It has more initial consonants but fewer vowels, final consonants and tones than southern varieties. Standard Chinese is an analytic language, though with many compound words. There are two standardised forms of the language, namely Putonghua in Mainland China and Guoyu in Taiwan. Aside from a number of differences in pronunciation and vocabulary, Putonghua is written using simplified Chinese characters (plus Hanyu Pinyin romanization for teaching), and Guoyu is written using traditional Chinese characters (plus Zhuyin for teaching). Many characters are identical between the two systems. In Chinese, the standard variety is known as: Standard Chinese is also commonly referred to by generic names for 'Chinese', notably 中文; Zhōngwén; 'Middle writing' and 中国话; 中國話; Zhōngguóhuà; 'Middle Kingdom speech' (compare 英文; Yīngwén; 'English writing' for English, and 英国; Yīngguó; 'English country '). In total, there have been known over 20 various names for the language. The term Guoyu had previously been used by non-Han rulers of China to refer to their languages, but in 1909 the Qing education ministry officially applied it to Mandarin, a lingua franca based on northern Chinese varieties, proclaiming it as the new 'national language'. The name Putonghua also has a long, albeit unofficial, history. It was used as early as 1906 in writings by Zhu Wenxiong to differentiate a modern, standard Chinese from classical Chinese and other varieties of Chinese. For some linguists of the early 20th century, the Putonghua, or 'common tongue/speech', was conceptually different from the Guoyu, or 'national language'. The former was a national prestige variety, while the latter was the legal standard.