Ch'ing scholar Ch'iu Chao-au devoted 20 years in annotating Tu Fu's poetry. When he finished his annotation and submitted it to the royal court, he was 67 years old. In annotating Tu Fu's poetry, Ch'iu made his best effort and collected as many materials as he could. His achievement was amazing and the annotation was considered complete. However, from present point of view, there are some shortcomings in the annotation. For instance, some of Tu Fu's friends are not recognized in the book. Therefore, the purpose of this article is to make up some of the insufficiencies of Ch'iu's book.