
Legacy Encoding Methods
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encoding whose second-byte values extend into the seven-bit region. EUC-TW, on the
other hand, is a mixed one-, two-, and four-byte encoding that is fundamentally made up
of planes. ey are compatible only in that some parts are equivalent: Big Five Levels 1
and 2 are equivalent to CNS 11643-2007 Planes 1 and 2.
Big Five encoding—Hong Kong SCS-2008
Hong Kong SCS-2008, which is implemented as an extension to Big Five encoding, in-
cludes 5,009 characters, 4,568 of which are hanzi. e characters that are specic to Hong
Kong SCS-2008 are encoded in two separate regions within Big Five