Sunshine Island, also known as Chau Kung To (周公島) indigenously, is a companion island of Hei Ling Chau in Hong Kong. Located northeast of Hei Ling Chau and south of Peng Chau, the island was once the site of a drug addiction treatment centre. The island features scenic rocks and some abandoned buildings. It has only one inhabitant, a 78-year-old named Lam Chi-ngai, and there is no public transport to the island.