No sorries mate. Just pointing out you might have forgotten the link... I've read it b4... bet you learnt online is the way to go I've purchased several very decent pieces from these street dealers but first, you must know your watch and be firm with price. Next speaking mandarin and even sometimes sounding like a local helps. (But if you sound too local, you will not be shown the trapdoor incase you're undercover - was told this by couple of dealers who thought i was an undercover haha) To escape, ask them to open the watch for inspection of mvmt, they'll either refuse, of which you can leave, or if they do (i never had one b4), proclaim its not swiss and promptly demand to exit.
Cheers