Lü Kai (died 225), courtesy name Jiping, was an official of the state of Shu Han during the Three Kingdoms period of China.

[1] Lü Kai was from Buwei County (不韋縣), Yongchang Commandery (永昌郡), which is located northeast of present-day Baoshan, Yunnan.

[6] During this time, the Shu general Li Yan wrote a total of six letters to Yong Kai to dissuade him from rebelling but only received an arrogant response from the latter.

Dou Rong knew that the Eastern Han dynasty would rise, so he pledged allegiance to Shizu and left his good name in history and let later generations sing praises of him.

[13] In the spring of 225, the Shu regent Zhuge Liang led an army on a southern campaign into the Nanzhong region to quell the rebellions and deal with intrusions by the Nanman tribes.

[5] While the Shu army was on its way, Yong Kai was slain by the subordinates of Gao Ding (高定), another rebel leader.

[5] He then wrote a memorial to the Shu emperor Liu Shan as follows: "Lü Kai, Wang Kang and other officials in Yongchang Commandery maintained their loyalty towards the State despite being stuck in a remote location for over 10 years.

[16][1] Lü Kai's colleague, Wang Kang (王伉), later became the Administrator of Yongchang Commandery and was also enfeoffed as a village marquis.

[18][1] Lü Xiang served under the Jin dynasty after the end of the Three Kingdoms period and held the position of Colonel of the Southern Barbarians (南夷校尉).

[19] In the fourth century, when Li Xiong, the founder of the Cheng state, led his forces to invade Ning Prefecture (寧州; covering present-day Yunnan and Guizhou), Lü Kai's descendants refused to surrender and led the people of Yongchang Commandery to resist the invaders.

Along with Huang Quan, Li Hui, Ma Zhong, Wang Ping, Zhang Ni, It was thanks to their qualities that they were all well known through the empire and because they seized the opportunity given to them that they left strong legacies.