- Traditional Chinese Character(HanT):
公元前：九二一年
- Simplified Chinese Character(HanS):
公元前：九二一年
- Bopomofo(Mandarin Phonetic Symbols): ㄍㄨㄥ ㄩㄢˊ ㄑㄧㄢˊ ㄐㄧㄡˇ ㄦˋ ㄧ ㄋㄧㄢˊ (ㄍㄩㄑㄐㄦㄧㄋ)
- Bopomofo(Zhuyin Keyboard Input/IME): "ej/ m06fu06ru.3-4u su06" (ej/m06fu06ru.3-4usu06)
- (ASCII) Hanyu Pinyin: "gongyuanqianjiueryinian" "Gong1Yuan2Qian2Jiu3Er4Yi1Nian2" "Gong1 Yuan2 Qian2 Jiu3 Er4 Yi1 Nian2" (GYQJEYN)
- (Latin) Hànyǔ Pīnyīn: YuánQiánJiǔèrYī [ 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"
