Yin Mo, courtesy name Siqian, was a man of Fu County in Zitong Commandery. In the region of Yi Province most people prized the new-text learning and did not esteem the study of chapter and verse, but Yin Mo knew that this was not broad enough. So he traveled far to study in Jing Province and received the old-text learning from Sima Decao (Sima Hui), Song Zhongzi (Song Zhong) and others. Records, Shu 12 §43
Yin Mo was versed in all the classics and histories, and he also devoted himself to Zuo's Spring and Autumn Annals, in which he became expert. From Liu Xin's Tiaoli to the commentaries and explanations of Zheng Zhong, Jia Kui and his father, Chen Yuan and Fu Qian, he could recite and expound nearly all of them, so that he no longer had to open the books. Records, Shu 12 §43
Li Ren, a man of the same county, also went to study in Jing Province together with Yin Mo and learned from Sima Hui, Song Zhong and others. Li Ren's son Li Zhuan received his learning in full, and also discussed principles under Yin Mo, reading widely in the Five Classics and the works of the philosophers. Records, Shu 12 §46
When the First Sovereign (Liu Bei) pacified Yi Province and took the post of Governor of Yi Province, he made Yin Mo Attendant Officer for Encouraging Learning. In the 25th year of Jian'an (220), after Emperor Wen of Wei (Cao Pi) took the imperial title and word spread that the Han emperor had been killed, reports of auspicious omens came in from many places one after another, and the Lieutenant Generals Zhang Yi (張裔) and Huang Quan, the Attendant Officers for Encouraging Learning Zhang Shuang, Yin Mo and Qiao Zhou, and others submitted a document. It cited passages from the prophetic texts of the Luo Writing and the Classic of Filial Piety and the signs of heaven, and asked that the Great King respond to heaven and accord with the people, ascend to the great enterprise without delay, and bring peace to the realm. Records, Shu 12 §44Records, Shu 2 §55–56 · 59
When the crown prince was established, the First Sovereign made Yin Mo Supervisor of the Crown Prince's Household and had him teach the Zuo Commentary to the Later Sovereign (Liu Shan). When the Later Sovereign ascended the throne, Yin Mo was appointed Grandee Remonstrant. Records, Shu 12 §44
When the Chancellor Zhuge Liang was stationed in Hanzhong, he requested Yin Mo and made him Army Libationer. When Zhuge Liang died in the 12th year of Jianxing (234), Yin Mo returned to Chengdu, was appointed Grand Palace Grandee, and died. The Records do not give the year of his death. His son Yin Zong inherited his learning and became an Academician. Records, Shu 12 §44Records, Shu 5 §38
In the assessment at the end of the volume, Chen Shou wrote that Xu Ci, Meng Guang, Lai Min and Li Zhuan were widely read and had heard much, and that Yin Mo was versed in the Zuo Commentary; although they were not praised for virtuous conduct or achievement, they were truly all scholars of their age. Records, Shu 12 §102