A Chinese character, also known as a Han character ( ), is a logogram used in writing Chinese (hanzi), Japanese (kanji), less frequently Korean (hanja), and formerly Vietnamese (hán tự).

The number of Chinese characters contained in the Kangxi dictionary is approximately 47,035, although a large number of these are rarely used variants accumulated throughout history. Studies carried out in China have shown that full literacy in the Chinese language requires a knowledge of only between three and four thousand characters.

In the Chinese writing system, each character corresponds to a single spoken syllable. A majority of words in all modern varieties of Chinese are poly-syllabic and thus require two or more characters to write. Cognates in the various Chinese languages/dialects which have the same or similar meaning but different pronunciations can be written with the same character. In addition, many Chinese characters were adopted according to their meaning by the Japanese and Korean languages to represent native words, disregarding pronunciation altogether. Chinese characters are also considered to be the world's longest continuously used writing system.

Chinese characters are also known as sinographs, and the Chinese writing system as sinography. Non-Chinese languages which have adopted sinography—and, with the orthography, a large number of loanwords from the Chinese language—are known as Sinoxenic languages, whether or not they still use the characters. The term does not imply any genetic affiliation with Chinese. The major Sinoxenic languages are Japanese, Korean, and Vietnamese.

Precursors

main: Neolithic signs in China

In the last 50 or so years, inscriptions have been found on Neolithic pottery in a variety of locations in China such as Bànpō near Xī'ān, as well as on bone and bone artifacts at Hualouzi, Chang'an County near Xi'an. These simple, often geometric marks have been frequently compared to some of the earliest known Chinese characters, on the oracle bones, and some have taken them to mean that the history of Chinese writing extends back over six millennia. However, because these marks occur singly, without any context to imply usage as writing, and because they are generally extremely crude and simple, Qiú Xīguī (2000, p.31) concluded that "we do not have any basis for stating that these constituted writing, nor is there reason to conclude that they were ancestral to Shang dynasty Chinese characters." Isolated graphs and pictures continue to be found periodically, frequently accompanied by media reports pushing back the purported beginnings of Chinese writing a few thousand years. For example, at Damaidi in Ningxia, 3,172 pictorial cliff carvings dating to 6000–5000 BC have been discovered, leading to headlines such as "Chinese writing '8,000 years old.'" Similarly, archaeologists report finding a few inscribed symbols on tortoise shells at the Neolithic site of Jiahu in Henan, dated to around 6,600–6,200BCE, leading to headlines of "'Earliest writing' found in China. However, each time, scholars urge caution and skepticism. Professor David Keightley, a renowned expert on Shang script, urged caution in the latter instance, noting "There is a gap of about 5,000 years. It seems astonishing that they would be connected," adding "we can't call it writing until we have more evidence."Chinese writing has enabled us to learn more about Ancient China, and what started such a magnificant writing was called the Oracle Bone script which developed in the Shang dynasty.