This paper concretely contemplates 3,500 Chinese letters, the first-grade in Chinese letter proficiency test, that are carefully selected by three institutions, The Society for Korean language & literature(한국어문회), Korea Association for the Promotion of Hanja Education(한자교육진흥회), Korea Test Association(대한검정회) respectively. Among those three institutions’ selection of first-grade letters, the following paper has identified 3,022 of common letters and found out each Chinese letter varied greatly in terms of level(grade). Also, explanation of the Chinese letter showed a difference from one institution to another in the extent of 12% to 30%. Such variations make the contents of learning differ severely depends on which institution the learner chose, and it is considered to affect learner’s Chinese letter proficiency ability heavily. Therefore it is inappropriate to be taken as nationally certified examination. The effort of the three institutions unifying the selection of Chinese letter and matching grades and explanation on each Chinese letter for diminishing confusion and increasing the reliability of the certified examination is needed.