一而二，二而一

一而二，二而一

Chinese

		one; single; a one; single; a; (before verbs) as soon as, once; (before a noun) entire (family, etc.)	and; as well as; but (not) and; as well as; but (not); yet (not); (shows causal relation); (shows change of state); (shows contrast)	two		two	and; as well as; but (not) and; as well as; but (not); yet (not); (shows causal relation); (shows change of state); (shows contrast)	one; single; a one; single; a; (before verbs) as soon as, once; (before a noun) entire (family, etc.)
simp. and trad. (一而二，二而一)		一	而	二	，	二	而	一
Literally: “One then two, two then one”.

Pronunciation

• Mandarin

  (Pinyin): yī ér èr, èr ér yī

  (Zhuyin): ㄧ ㄦˊ ㄦˋ, ㄦˋ ㄦˊ ㄧ

• Cantonese (Jyutping): jat¹ ji⁴ ji⁶, ji⁶ ji⁴ jat¹

---

• Mandarin
  • (Standard Chinese)⁺
    • Pinyin: yī ér èr, èr ér yī
    • Zhuyin: ㄧ ㄦˊ ㄦˋ, ㄦˋ ㄦˊ ㄧ
    • Gwoyeu Romatzyh: i erl ell, ell erl i
    • IPA ^(key): /i⁵⁵ ˀɤɻ³⁵ ˀɤɻ⁵¹⁻⁵³ ˀɤɻ⁵¹ ˀɤɻ³⁵ i⁵⁵/
• Cantonese
  • (Standard Cantonese, Guangzhou)⁺
    • Jyutping: jat¹ ji⁴ ji⁶, ji⁶ ji⁴ jat¹
    • Yale: yāt yìh yih, yih yìh yāt
    • Cantonese Pinyin: jat⁷ ji⁴ ji⁶, ji⁶ ji⁴ jat⁷
    • Guangdong Romanization: yed¹ yi⁴ yi⁶, yi⁶ yi⁴ yed¹
    • IPA ^(key): /jɐt̚⁵ jiː²¹ jiː²² jiː²² jiː²¹ jɐt̚⁵/

Idiom

一而二，二而一

1. one and the same
2. two sides of the same coin