This article traces how biography (zhuan 傳) developed as a genre. While literary writing and historical writing diverged and literary genres were more finely divided, "biography in corpus" (jizhuan 集傳) had its own evolution path. The nature of "biography in corpus" therefore includes focusing on the common people to showcase the author's individuality. Han Yu 韓愈 and Ouyang Xiu's 歐陽修 biographies were two typical cases to illustrate the characteristics of this genre. Since "biography in corpus" is suitable for presenting individuality, those who have strong personality may author biographies with their own features. Su Shi 蘇軾, the most outstanding and interesting man of letters in the Song dynasty, has three biographies in his complete works. Together they show the characteristic of "biography in corpus" and also reflect aspects of his thought which may be regarded as "against the current".