GB 2312

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GB/T 2312-1980 is a key official character set of the People's Republic of China, used for Simplified Chinese characters. GB2312 is the registered internet name for EUC-CN, which is its usual encoded form. GB refers to the Guobiao standards (国家标准), whereas the T suffix (推荐; tuījiàn; 'recommendation') denotes a non-mandatory standard. GB/T 2312-1980 was originally a mandatory national standard designated GB 2312-1980. However, following a National Standard Bulletin of the People's Republic of China in 2017, GB 2312 is no longer mandatory, and its standard code is modified to GB/T 2312-1980. GB/T 2312-1980 has been superseded by GBK and GB 18030, which include additional characters, but GB/T 2312 remains in widespread use as a subset of those encodings. As of July 2026, GB2312 is the second-most popular encoding served from China and territories (after UTF-8), with 3.3% of web servers serving a page declaring it. Globally, GB2312 is declared on less than 0.04% of all web pages. However, all major web browsers decode GB2312-marked documents as if they were marked with the superset GBK encoding, except for Safari and Edge on the label GB_2312 (they do however decode GB_2312-80 and GB2312 as the superset). There is an analogous character set known as GB/T 12345 Code of Chinese ideogram set for information interchange supplementary set, which supplements GB/T 2312 with traditional character forms by replacing simplified forms in their qūwèi code, and some extra 62 supplemental characters.