Jia Sidao (1213-1275) was a chancellor during the late Song dynasty of China, the brother of a concubine of Emperor Lizong, a subsequent relationship of special favor of Emperor Duzong, and with roles in the Mongol-Song Battle of Xiangyang and an unpopular land nationalization program in the 1260s. Sidao was assassinated by a court-designated sheriff charged with his custody after his court failures.
Jia Sidao (Chinese: 賈似道; pinyin: Jiǎ Sìdào; Wade–Giles: Chia Ssu-tao) was born in 1213, to a family that included a sister who became a concubine of the Emperor Lizong.
Jia Sidao was a chancellor from 1260 - 1273 during the late Song dynasty of China. He is reported to have risen to the rank of chancellor because his sister, Lady Jia, was a favored concubine of the Emperor Lizong.
Sidao is best known for his intervention in the Battle of Xiangyang, where he hid the true situation from the Song court and so is suggested by some to be responsible for its demise. Sidao is also referred to by some as corrupt and impotent.
Sidao enjoyed the special favor of the Emperor Duzong. Being Jia's junior by 27 years, the Emperor used to stand up upon his entrance, called him "teacher" (though Jia was not an imperial degree holder, and never held such a formal post), and is said to have knelt in tears on one occasion, begging Sidao to remain in office.