- Traditional Chinese Character(HanT):
西元前：二一年
- Simplified Chinese Character(HanS):
西元前：二一年
- Bopomofo(Mandarin Phonetic Symbols): ㄒㄧ ㄩㄢˊ ㄑㄧㄢˊ ㄦˋ ㄧ ㄋㄧㄢˊ (ㄒㄩㄑㄦㄧㄋ)
- Bopomofo(Zhuyin Keyboard Input/IME): "vu m06fu06-4u su06" (vum06fu06-4usu06)
- (ASCII) Hanyu Pinyin: "xiyuanqianeryinian" "Xi1Yuan2Qian2Er4Yi1Nian2" "Xi1 Yuan2 Qian2 Er4 Yi1 Nian2" (XYQEYN)
- (Latin) Hànyǔ Pīnyīn: XīYuánQiánèrYī [ Xī Yuán Qián èr Yī ]
- (英文翻譯) English Translation: "21 BC"
- (西語翻譯) Traducción Español: "antes de Cristo: 21"
- (日文翻譯) 日本語翻訳: "BC: 21"
