贵妃 was the second-highest consort rank below 皇后 (empress) during the Tang dynasty. Yang Guifei 杨贵妃 (719-756), beloved of Emperor Xuanzong, is the most famous bearer of the title.
culture
The dish 贵妃鸡 (Guifei chicken) is named after Yang Guifei; it's braised with wine, evoking her reputation for being fond of drink.
