Taxis are cheap and plentiful but getting to an exact address can be difficult unless your Cantonese is up to scratch. Use the underground (MTR) instead.
Each MTR station has lettered exits. There is always a map in the station and using this can help you find the correct exit. Or just ask the office you are visiting for the exit number. If you are revisiting, write the exit number on any business card you get - but not while you are in the meeting. It's a bit of an insult to write on a business card.
Finding your way on the MTR
