一成不变 Save Sign in to save words Traditional (Taiwan): 一成不變 On the HSK 7-9 vocabulary list, at CEFR level C2. yīchéngbùbiàn ㄧ ㄔㄥˊ ㄅㄨˋ ㄅㄧㄢˋ 男 女 immutable impervious to change set in stone idiom Character by character 一(yī)one 成(chéng)succeed 不(bù)no 变(biàn)change A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0 国际中文教育中文水平等级标准, 中华人民共和国教育部, MIT