In 665, when Emperor Gaozong was preparing to make sacrifices to heaven and earth at Mount Tai, the officials in charge generally opined that, based on regulations written during the Han Dynasty, the two officials who should sacrifice after Emperor Gaozong were the ministers of ceremonies (太常卿, Taichang Qing) and palace supplies (光祿卿, Guanglu Qing) — two titles that carried far more prestige and importance in Han Dynasty than they did in the Tang Dynasty. Liu rebutted their recommendations, pointing out the absurdity of adopting Han regulations that were written for a different structure of government. Emperor Gaozong agreed, and instead, he had his uncle Li Yuanli (李元禮) the Prince of Xu sacrifice after himself, and had Liu sacrifice after Li Yuanli. After the completion of the ceremony (which was held in 666), Emperor Gaozong created Liu the Duke of Guangping. Later that year, Liu requested that he be allowed to retire, and Emperor Gaozong allowed him to retire and bestowed on him the honorific title of Zijin Guanglu Daifu (紫金光祿大夫). He died later that year, and his son Liu Qixian (who later changed his name to Liu Jingxian to observe naming taboo as to Emperor Gaozong's crown prince Li Xian) inherited his title.