Tough to get to: you need over half an hour from the ferry pier to reach this cache. The start is easy, paved path, after the pavilion it quickly gets harder. Refer to OpenStreetMap for trails. Bits are steep, loose rocks, overgrown trail - this is for experienced hikers only.
Cache is hidden near the trig point.
Kat O can only be reached by private boat or by joining a local tour; or you have to be lucky enough to get access to Sha Tau Kok to catch the village ferry.