The Longzhong Plan is the name given to a strategic plan by Zhuge Liang, a statesman of the Shu Han state in the Three Kingdoms period (220–280) of China. Zhuge Liang presented the plan to Liu Bei, a warlord who became the founding emperor of the Shu Han state, sometime in 207 towards the end of the Eastern Han dynasty when Liu Bei visited him at his residence in Longzhong, an area in the west of present-day Xiangyang, Hubei. The Longzhong Plan formed the basis for the establishment of the Shu Han state. In essence, the plan required Liu Bei to gain control over Jing and Yi provinces, which covered present-day Hubei and Hunan, and Sichuan and Chongqing, respectively, so as to secure a viable base for staging attacks against Liu Bei's rival, Cao Cao, and his territories in central and northern China. The plan also required Liu Bei to form a strategic alliance with another warlord, Sun Quan, who was based in eastern China.
Details Zhuge Liang's biography in the historical text Records of the Three Kingdoms, written by Chen Shou in the late third century, recorded the details of the private conversation between him and Liu Bei in his house in Longzhong. Liu Bei said: "The Han dynasty is in decline. Villainous officials usurp power while the Emperor was forced into exile. I may be unworthy in both strength and virtue, but I still want to uphold justice and righteousness in the Empire. However, I am not intelligent and shrewd enough, which is why I have repeatedly suffered setbacks and ended up in my current situation. Nevertheless, I have neither deviated from my initial intentions nor given up on my ambitions. Sir, what do you think I can do?" Zhuge Liang replied: "Since Dong Zhuo usurped power, many warlords throughout the Empire have risen up, seized and controlled territories. Cao Cao was inferior to Yuan Shao in terms of fame and military power, yet he managed to defeat Yuan Shao and transform from a weak to a powerful warlord. This was not due to only favourable circumstances, but also human intelligence and wisdom. Now, as Cao Cao leads hundreds of thousands of troops and uses the Emperor's name to command other warlords, you definitely can't compete with him directly. Sun Quan rules over Jiangdong and his family has controlled the region for three generations. He has geographical advantage, the hearts of the people, and the support of many wise and talented advisers. You should attempt to make contact and form an alliance with him instead of trying to conquer his territories. As for Jing Province, it has natural geographical barriers such as the Han and Mian rivers in the north, as well as direct access to an abundance of resources from the sea in the south. It is connected to Wu and Kuaiji commanderies in the east, and Ba and Shu commanderies in the west. It is a strategic location in the eyes of military strategists. Its ruler doesn't have the capability to defend it. It is a special gift from Heaven to you, General. Do you, General, have the intention of seizing it? Yi Province is a geographically strategic location. It has thousands of li of fertile land and has been called a "Country of Heaven". Emperor Gaozu used it as his base when he started conquering the Empire. Liu Zhang is incompetent and weak. He also faces the threat of Zhang Lu in the north. Even though his domain is wealthy and prosperous, he doesn't know how to treasure it. All the talents there hope to serve under a wise ruler. General, you are not only a member of the imperial clan, but also a man famous throughout the Empire for his integrity and righteousness. You have attracted heroes to aid you, and you seek wise and capable talents like a thirsty man looking for water. If you control Jing and Yi provinces and make use of their strategic geography to defend them well. At the same time, you should foster good relations with the Rong peoples in the west and implement policies to placate and pacify the Yi and Yue peoples in the south. Externally, you should build a strong alliance with Sun Quan; internally, you should reform government and promote civil culture. When the opportunity arises, you can order one of your senior officers to lead troops from Jing Province to attack Wancheng and Luoyang, while you, General, can personally lead troops out of Yi Province via the Qin Mountains. When you do this, won't the people welcome you and your troops with food and drink? If this really happens, you will be able to fulfil your ambition and the Han dynasty will be revived."
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