Agree wtih above. Unfortunately I lef those busines cards at my home. The good dealers will show you the good ones (not in their store) from their supplier's office upstaris if they know you.
anyway, it will be a nice trip, good experience for you. you will see them selling straps, watch case, dials, watch stand, for wholesale prices
If you are to use the MTR (underground train), Yuexie Park will be the station you want to get off.
This 'coin' is the train ticket.
Watch City
Foods there are nice and reasonable too! Chinese buffets.