Overview
Empress Zhang (; Chinese: 張皇后, personal name unknown; died May 16, 762) was an empress of the Chinese Tang dynasty. She was the second wife of Emperor Suzong and gained great power and influence during his reign, in alliance with the eunuch Li Fuguo; both together successfully launched many vicious plots against their opponents and influenced the power of the emperor. but eventually she and Li Fuguo turned against each other late in Emperor Suzong's reign, as the emperor grew gravely ill and they both wanted to take sole control of the power on the throne and choose their favorite candidate to succeed to the throne. Zhang tried to have Li Fuguo put to death, but instead was captured and killed by Li Fuguo and was posthumously demoted to commoner rank by Emperor Daizong.
Background
The future Empress Zhang's family was originally from Deng Prefecture (鄧州, roughly modern Nanyang, Henan). Her grandmother Lady Dou was a younger sister of Consort Dou, a concubine of Emperor Ruizong, whose son Li Longji later became emperor (as Emperor Xuanzong). Consort Dou was put to death by Emperor Ruizong's mother Wu Zetian in 693, while Li Longji was just eight. Lady Dou spent much time raising Li Longji, and later, after Emperor Ruizong returned to the throne in 710, he created Lady Dou the Lady of Deng and honored her greatly. Her sons Zhang Quhuo (張去惑), Zhang Quyí (張去疑), Zhang Qushe (張去奢), Zhang Quyì (張去逸, note different tone than his brother), and Zhang Quying (張去盈) all became key officials, and Zhang Quyì would become the father of the future Empress Zhang.
As princely consort
During Emperor Xuanzong's Tianbao era (742-756), the future Empress Zhang was selected to be a concubine for Emperor Xuanzong's son and crown prince Li Heng, and she carried the title of Liangdi, the highest rank for the Crown Prince's concubines. It was said that after he was forced to divorce his wife Crown Princess Wei in 746, she became his favorite consort. She was said to be intelligent and well-spoken, and she knew how to please him.
In 755, the general An Lushan launched a major rebellion against Emperor Xuanzong's rule, and in 756 was approaching the capital Chang'an, forcing Emperor Xuanzong and Li Heng to flee.
From Wikipedia (CC BY-SA 4.0).