Mandarin was the official language of China and the People's Republic of China. Mandarin is a kind of alphabetic language that uses the latin alphabets as the basis and the chinese characters as the main auxiliary characters. The pronunciation system of Mandarin consisted of four tones, five initial syllables, and ten final syllables. The pronunciation of Mandarin was featured by its undulating tones, short syllables, and clear pronunciation. The vocabulary of Mandarin is very rich. There are a total of 43 initial syllables and 156 finals, as well as many variants and derivative words. There were 26 commonly used Chinese characters and 24 commonly used Pinyin. As the official language of the People's Republic of China, Mandarin was widely used in politics, economy, culture, education, science and technology, and other fields.