Hi Simon:
Some years ago, I came down a very rough track from Sharp Peak, down to ridge and then along to the saddle between Chek Keng and Tai Long (dark by the time we were part way down; once at bottom of main slope, used keyring flashlight to find a sign warned of dangerous slope, which people shouldn’t go up!).
I think this is still viable, though difficult, and warned against (not sure if there are any official trails to the top).
Martin