History of China
In 2013, Yi wrote "Yi Zhongtian Zhonghua Shi" (易中天中华史; "Yi Zhongtian's History of China"). A year later, he wrote "San Guo Ji" (三国纪; "Chronicles of the Three Kingdoms") to dispel myths about the historical figures Cao Cao, Liu Bei, Sun Quan and Zhuge Liang.