GBK
Range
Codepoints
Amount
GB2312-80 and GB/T 12345-90 non-Chinese characters
A1A1 - A9FE
846
717
GB 2312-80 Chinese characters
B0A1 - F7FE
6 768
6 763
Chinese characters from ISO 10646-1:1993
8140 - A0FE
6 080
6 080
Chinese characters from ISO 10646-1:1993 and extra characters
AA40 - FEA0
8 160
8 160
Non Chinese characters from Big5 and other
A840 - A9A0
192
166
Total
23 940
21 886
GBK is a superset of GB 2312-80 but also a subset of GB 13000.1-93.
GBK is an abbrivation of 国家标准扩展 guójiā biāozhǔn kuòzhǎn. It was proposed on December 1, 1995 by the CITS (中华人民共和国全国信息技术标准化技术委员会 zhōnghuárénmíngònghéguó quánguó xìnxī jìshù biāozhǔnhuà jìshù wěiyuánhuì)
Several companies joined foces on December 15, 1995 and proposed some improvements. These were accepted and the characterset was published as version 1.0. It was a step towards Unicode but to keep compatability with GB2312-80. Since the characterset was almost completely filled, there was a switch to GB 18030.
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