For many years, academic circles have been discussing the issue of "Red Cliff", and various theories have been called "New Red Cliff War" by modern media. Generally speaking, there are at least seven kinds of "Red Cliff Theory": Puyin Theory, Huangzhou Theory, Zhongxiang Theory, Wuchang Theory, Hanyang Theory, Hanchuan Theory and Jiayu Theory. Judging from the current discussion, the focus of the debate is Pu Yin's theory, Jia Yu's theory and Huang Zhou's theory, and the other four theories are difficult to establish.

1. Puyin said: Yin Falu's Notes on the Translation of Ancient Books wrote: "That Chibi is in the northwest of Puyin County, Hubei Province, on the south bank of the Yangtze River." "Yuanhe County Records" also said: "Chibi Mountain is 120 miles west of Pu Xian County, and there is a great river in the north, and its north shore is Wulin, that is, Zhou Yu used Huang Gaice to burn Cao Gong boat, but it failed. Hu Sansheng's "Learning from the Same Experience" and Tan Qixiang's "Atlas of Chinese History" are also key points. Among the three statements, Puyin is more credible, because in recent years, a large number of cultural relics have been unearthed in Puyin Chibi. 199 1 The Essays on the Ancient Battlefield Puyin Chibi published by the School of Humanities of Hubei University agrees with the above viewpoint.

2. Jiayu said: "Ancient Chinese" edited by Wang Li and "Selected Literary Works of China in Past Dynasties" edited by Zhu Dongrun both hold the view that Chibi is in the northeast of Jiayu County, Hubei Province. If we trace back to the source of this theory, there is evidence that the Draft of the Unified History of Qing Dynasty was quoted from Zhu. "Notes on Water Classics" said: "Chibi Mountain is in the south of Bairen Mountain, and it should be in the northeast of Jiayu County, at the junction with Jiangxia, and go to Wulin for 200 miles." This statement was later recognized by Yang Shoujing, a famous geographer in the late Qing Dynasty.