1. The phonology of Standard Chinese or Standard Mandarin is based on the Beijing dialect, but its vocabulary is drawn from the northern dialects. The grammar is standardized to the body of modern literary works that define written vernacular Chinese (originally Baihua).
2. It is formed over long period of time from northern dialects and Beijing dialect, and is constantly absorbing dialect compositions for further enrichment and development. It has clear rules and specifications and a high degree of language standardization. It plays an important and global role in social language life.