Princess Taihe (太和公主, personal name unknown), later known as Princess Ding'an (定安公主) or Princess Anding (安定公主), was a princess of the Chinese Tang dynasty and a khatun (empress) of Huigu. She was married to Huige's Chongde Khan as part of the Heqin system of marriages between Tang princesses and Huigu khans, but suffered through Huigu's subsequent collapse before being welcomed back to the Tang court.