- Traditional Chinese Character(HanT):
西元前：九二一年
- Simplified Chinese Character(HanS):
西元前：九二一年
- Bopomofo(Mandarin Phonetic Symbols): ㄒㄧ ㄩㄢˊ ㄑㄧㄢˊ ㄐㄧㄡˇ ㄦˋ ㄧ ㄋㄧㄢˊ (ㄒㄩㄑㄐㄦㄧㄋ)
- Bopomofo(Zhuyin Keyboard Input/IME): "vu m06fu06ru.3-4u su06" (vum06fu06ru.3-4usu06)
- (ASCII) Hanyu Pinyin: "xiyuanqianjiueryinian" "Xi1Yuan2Qian2Jiu3Er4Yi1Nian2" "Xi1 Yuan2 Qian2 Jiu3 Er4 Yi1 Nian2" (XYQJEYN)
- (Latin) Hànyǔ Pīnyīn: XīYuánQiánJiǔèrYī [ Xī Yuán Qián Jiǔ èr Yī ]
- (英文翻譯) English Translation: "BC: 921"
- (西語翻譯) Traducción Español: "antes de Cristo: 921"
- (日文翻譯) 日本語翻訳: "紀元前: 921"
