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Internal use template used in the process of generating a four-byte GB 18030 code which encodes a a Basic Multilingual Plane code. Used by Template:GB18030/BMP. Not needed by Template:GB18030/astral.
Usage
[edit]Takes one argument: a decimal number n referring to the nth possible GB 18030 four-byte code counting from 0 (what the WHATWG calls an index gb18030 ranges pointer).