Written vernacular Chinese, also known as baihua, comprises forms of written Chinese based on the vernacular varieties of the language spoken throughout China. It is contrasted with Literary Chinese, which was the predominant written form of the language in imperial China until the early 20th century.

Written Chinese is a writing system that uses Chinese characters and other symbols to represent the Chinese languages. Chinese characters do not directly represent pronunciation, unlike letters in an alphabet or syllabograms in a syllabary. Rather, the writing system is morphosyllabic: characters are one spoken syllable in length, but generally correspond to morphemes in the language, which may either be independent words, or part of a polysyllabic word. Most characters are constructed from smaller components that may reflect the character's meaning or pronunciation. Literacy requires the memorization of thousands of characters; college-educated Chinese speakers know approximately 4,000. This has led in part to the adoption of complementary transliteration systems as a means of representing the pronunciation of Chinese.