Yan Chongnian, president of Beijing Manchu Association and one of the main speakers of百家讲坛, was slapped by a young man when he was signing books in Wuxi Xinhua Bookstore on October 5. He was not only slapped but also abused as "traitor". After the incident, netizens debated fiercely online. Many people expressed their dissatisfaction towards the behavior of the young man who used violence to express his academic opinion and condemned that it was unacceptable to beat an old man. Also, many people thought that this matter was understandable because Yan Chongnian's quotations which suppress the Han nationality and advocate the Man nationality were circulating online and reversing black and white.