The Duke of Mount Deer () is a Hong Kong wuxia-comedy television series adapted from the novel The Deer and the Cauldron by Jin Yong. It was first aired on TVB in Hong Kong in 1998.
Wei Xiaobao is the son of a prostitute in a brothel in Yangzhou. After joining the Heaven and Earth Society, he heads to the capital and gets enrolled into the service of the palace eunuchs. There, he becomes friends with the young Kangxi Emperor and falls in love with the emperor's younger sister, Princess Jianning. His adventures in the Forbidden City leads him into discovering that the empress dowager is an impostor; finding several volumes of the Sutra of Forty-two Chapters, which contains the location of a treasure cave; helps the emperor kill the overbearing aristocrat Oboi; and see his position rise from humble eunuch to a grand courtier and confidante of the emperor.