The Chinese language is used as native language by the greatest number of people in the world. One of the significant distinctions between Chinese and Western languages lies in that it is composed of characters rather than letters. The Chinese language is the oldest writing system still in use. In China, although people from different regions may not understand each other's dialects, they have little difficulty in communicating because Chinese characters are written in a uniform form. The Chinese language has played quite an important role in the unification of the Chinese nation in history. Nowadays, with China's rapid economic growth and increasing global influence, more and more people in other countries begin to learn Chinese.