Grand Princess Jincheng
| Li Xiayu | |
|---|---|
| Grand Princess Jincheng | |
| Born | c. 643 Longxi Chengji (modern-day Qin'an County, Gansu, China) |
| Died | 691 |
| Burial | 705 Qianling Mausoleum |
| Spouse | Quan Yi |
| Father | Emperor Gaozong of Tang |
| Mother | Pure Consort Xiao |
Grand Princess Jincheng (c. 646–691) personal name Li Xiayu (Chinese: 李夏雨) was a princess of Tang dynasty. She held the title Princess Yiyang during her lifetime, and was posthumously honored with the title Grand Princess Jincheng in 705. She was the eldest daughter of Emperor Gaozong of Tang and Consort Xiao Shufei.