Kau Sai Chau Rock Carving was discovered in 1976. It is located at the north-western coast of Kau Sai Island where accessibility by land is extremely poor. The design itself is badly weathered, especially on its lower half. However, a zoomorphic motif is still visible when examined closely and carefully. The worked surface is approximately 2m above the highest water mark, which is a rather low position compared to similar rock carvings.