- Traditional Chinese Character(HanT):
公元：：二一年
- Simplified Chinese Character(HanS):
公元：：二一年
- Bopomofo(Mandarin Phonetic Symbols): ㄍㄨㄥ ㄩㄢˊ ㄦˋ ㄧ ㄋㄧㄢˊ (ㄍㄩㄦㄧㄋ)
- Bopomofo(Zhuyin Keyboard Input/IME): "ej/ m06-4u su06" (ej/m06-4usu06)
- 「公元：：二一年」的漢語拼音: Gong1 Yuan2 Er4 Yi1 Nian2
- (ASCII) Hanyu Pinyin: "gongyuaneryinian" "Gong1Yuan2Er4Yi1Nian2" "Gong1 Yuan2 Er4 Yi1 Nian2" (GYEYN)
- (Latin) Hànyǔ Pīnyīn: YuánèrYī [ Yuán èr Yī ]
- (英文翻譯) English Translation: "AD: 21"
- (西語翻譯) Traducción Español: "Anuncio::21"
- (日文翻譯) 日本語翻訳: "西暦::21"
