这是欧洲英语水平考试级别，TheAssociation of Language Testers in Europe(ALTE）：
A Basic User
A1 Breakthrough
A2 Waystage
B Independent User
B1 Threshold
B2 Vantage
C Proficient User
C1 Effective Operational Proficiency
C2 Mastery
C1：Upper intermediate（中高级）.
达到水平：Can understand a wide range of demanding, longer texts, and recognise implicit meaning. Can express him/herself fluently and spontaneously without much obvious searching for expressions. Can use language flexibly and effectively for social, academic and professional purposes. Can produce clear, well-structured, detailed text on complex subjects, showing controlled use of organisational patterns, connectors and cohesive devices.
与其他英语水平考试对比：
你达到C1水平已经非常了不起了，恭喜你！
