| Empress Dowager Xiaoding 孝定皇太后 | |||||
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| Empress dowager of the Ming dynasty | |||||
| Tenure | 5 July 1572 – 1614 | ||||
| Predecessor | Empress Dowager Zhaosheng | ||||
| Born | 1545 Huo County, Zhili (present-day Tongzhou District, Beijing, China) | ||||
| Died | 18 March 1614 (aged 68–69) | ||||
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| Spouse | Longqing Emperor | ||||
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| Clan | Li (李) | ||||
| Father | Li Wei, Marquis of Wuqing (武清侯 李偉) | ||||
| Mother | Lady Wang (王氏) | ||||
Empress Dowager Xiaoding (1545 – 18 March 1614), of the Li clan, was the mother of the Wanli Emperor. She was the nominal Regent of China during the minority of her son from 1572 to 1582. She became known in history under her posthumous name, Xiaoding.