居然 On the HSK 5 vocabulary list, at CEFR level C1. jūrán ㄐㄩ ㄖㄢˊ unexpectedly to one's surprise go so far as to Where 居然 is used Example sentences and grammar articles using 居然 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