Overview
Empress Dowager Li (李太后, personal name unknown) (died 965) was the mother of Meng Chang, the last emperor of the Chinese Five Dynasties and Ten Kingdoms period state Later Shu. She was a concubine of Meng Chang's father Meng Zhixiang (Emperor Gaozu).
Background
It is not known when the future Empress Dowager Li was born, but it is known that she was from Taiyuan. At one point, she became a concubine of Li Cunxu — the future founding emperor of Later Tang and, at that time, the heir to Li Keyong the Prince of Jin. Sometime later, she was awarded to the Jin official Meng Zhixiang as a concubine of his, possibly as an attendant to Li Keyong's daughter, whom Li Keyong gave in marriage to Meng as Meng's wife.
As Meng Zhixiang's concubine
In 918 or 919, there was a time when Lady Li dreamed of a star falling into her abdomen. She informed this dream to Meng Zhixiang's wife (who would later, after Later Tang's founding in 923, be created the Grand Princess Qionghua), who believed this to be a favorable omen. The future princess thus had her attend to Meng. She gave birth to his third son Meng Renzan in late 919.
In 934, Meng Zhixiang, who then carried the title of Prince of Shu as a Later Tang subject, declared himself Emperor of Shu. With Grand Princess Qionghua having died by that point, he posthumously honored her as empress, and created Lady Li an imperial consort, initially with the rank of Furen (夫人), and then the greater title Guifei (貴妃).
From Wikipedia (CC BY-SA 4.0).