Li Chengliang (Chinese: 李成梁; pinyin: Lǐ Chéngliáng; Korean: 이성량) (1526 - 1618) was a Chinese general of Korean descent in the reign of the Wanli Emperor during the Ming Dynasty who was in charge of maintaining peace and relations with the Jurchen tribes. He was from Tielin and was from a military family.
He never had a very prosperous childhood and early life, so he was age 40 before he received an official appointment. He slowly rose up the ranks to eventually become Liaodong Regional Commander (Chinese:遼東總兵) with the backing of the Chief Grand Secretary Zhang Juzheng. Li Chengliang was twice appointed Liaodong Regional Commander. The first commission lasted 22 years, the second 8 years.
Read more about Li Chengliang: Military Career Against The Mongols