You're off to Hong Kong alone but cannot navigate an airport?
Actually, to stop you sounding like a complete ****, once I was needing to get from Heathrow to Gatwick and there were multiple coach locations.
There was no indication of which stop to wait at other than a number, walking around with little time left I asked at the Ticket Info desk in which she point across the hall to a numbered sign. "That stop there sir, every 15mins (or 30mins?)" anyway...
I waited till it became unbearably close to missing my flight if I didn't leave
NOW and asked some more staff around me, is this the stop for the express to gatwick? They all said yes.
So, even after asking staff involved multiple times, they all directed me to the completly wrong ******* coach terminal. Missed my flight, took one next morning luckily for 24quid. Ah, good times.
That being said though, inter-airport bus/train is so much easier as everything is sign posted.
Also I believe Heathrow was being worked on at the time, so I can't be blamed for lack of signs and ***** temporary path diversions and staff who don't know what they are talking about. It's all so easy these days.