This is a typical foot reflexology chart from Happy Valley. Foot reflexology is big business in HK, with many local adherents and 'converted' expats that swear by the rejuvenating & relaxing effects. I have yet to try it, though Im looking forward to a session. Just check out the luxuriously appointed digs at 'Fun Feet' below. Hell I'd go just to sit in the chair.

The diagram illustrates the various locations for sympathetic organ excitation etc. Apparently you can cure stomach ulcers, kidney stones, and other ailments, just by activiating the right area. I assume you really have to know what you're doing, lest you accidently excite the bowels or bladder, or even worse stop someone's heart...