Not to be confused with Sharp Island in the Georgian Bay
Sharp Island or Kiu Tsui Chau is the largest island in the Kiu Tsui Country Park located at Port Shelter of Sai Kung, Hong Kong. Tourists go there for BBQ activities, fishing, swimming as well as diving. Sharp Island is under the administration of Sai Kung District.
Wikipedia https://en.wikipedia.org/wiki/Sharp_Island
Coordinates 22°21'54.264" N 114°17'36.363" E