The Chinese, Japanese and Korean (CJK) scripts share a common background, collectively known as CJK characters. During the process called Han unification, the common (shared) characters were identified and named CJK Unified Ideographs. As of Unicode 16.0, Unicode defines a total of 97,680 characters.[1]
The term ideographs is a misnomer, as the Chinese script is not ideographic but rather logographic.
Until the early 20th century, Vietnam also used Chinese characters (Chữ Nôm), so sometimes the abbreviation CJKV is used.