The abbreviated era name is the first character of the full era name; that is, either the single-character case-insensitive Latin alphabet abbreviation or the single-character Kanji abbreviation.

• 中,缩写纪元名称是完整纪元名称的第一个字符;也就是说,或者是不区分大小写的单字符拉丁字母缩写,或者是单字符异体汉字缩写。