認真 Simplified: 认真 On the HSK 1 vocabulary list, at CEFR level A1. rènzhēn ㄖㄣˋ ㄓㄣ conscientious earnest serious to take seriously to take to heart Where 認真 is used Example sentences and grammar articles using 認真 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