Wong Tai Sin Belief and Customs in Hong Kong refers to the Hong Kong folk belief and worshipping activities of Master Wong Tai Sin, which can be traced back to Jinhua, Zhejiang, China, and is inherited from the Pearl River Delta region of Guangdong. It includes beliefs, values, a culture of worship, legends, and the time- and season-related customs and activities, relevant rituals, literature, classics, and cultural relics arising therefrom.

Master Wong Tai Sin refers to a Taoist called Wong Cho Ping, who was born in a poor family in c. 328 during the Eastern Jin dynasty. According to Master Wong Tai Sin’s own narration, he began herding sheep in the vicinity of Red Pine (Cisong) Mountain in northern Jinhua County, Zhejiang Province when he was eight years old. When he was 15 years old, Master Wong Tai Sin encountered an immortal and was taught the techniques of meditation and herbal refining, after which he spent 40 years practising in the mountains. Later, his older brother, Wong Cho Hei reunited with Master Wong Tai Sin after following the guidance of a Taoist. When his older brother asked him about the whereabouts of the sheep, Master Wong Tai Sin led him to the east side of the hill. He pointed into the distance and shouted at a cluster of white rocks. In an instant, the rocks transformed into sheep. Wong Cho Hei was amazed by the miracle and developed the will to cultivate. Therefore, he started bitter cultivation together with Master Wong Tai Sin. In the end, both of them became immortals. Master Wong Tai Sin is also called the Red Pine  (Cisong) Immortal because he was known to live in hermitage there.