Abstract: Fengwen yanshi (impeachment according to public opinion) which is a supervisory system played a special role in China’s feudal era. However, the system has had varying interpretations regarding its origins and evolution. ZHOU Yiliang, a modern historian, based on sources, such as Book of Later Han: Biography of CAI Yong and Supplement to Book of Later Han: The Treatise on Officials, asserts that impeachment according to public opinion originated from a proposal by CAI Yong of the later Han Dynasty to Emperor Ling of Han in his Seal Memorials to the Throne known as Three Excellencies Heed Public Opinion and Feedback. However, the purpose of heeding public opinion and feedback was to assess political or military achievements of officials and was not directly related to the supervisory duties of the imperial censor. The Imperial Decrees in Tianjian Reign by Emperor Wu of the Liang Dynasty indicates his encouragement in impeachment according public opinion, with the aim of correcting wrongdoings and punishing the guilty. The system can be traced back to Emperor Wu of Han dispatching xiuyi zhizhi (just imperial censors). The just imperial censors who were embroidered-clad investigated guilty officials. By emphasizing harsh officials and severe codes, they uncovered wrongdoings by officials. In doing so, the intention of granting special privileges to the imperial censors was complemented. Due to the fact that some imperial censors enjoyed immunity even if their reports lacked factual basis, the design flaws of this system made it prone to wrongful judgments. As a result, there have been ongoing controversies since its implementation.