Folks, please disregard all info on the Shenzen Airport guides you have as it's outdated as the new terminal opened 3 months ago and I had a very bad time getting about.
International Arrivals is on LEVEL 1 aka GROUND. Fill up the yellow embarkation form and exit to the Ground Transport Center which is on the other building.
There are many shops and you will see a Starbucks there on the left. The old terminal is at AIRPORT EAST but new one is a distance away and you take the LUOHU Line (Green) Metro to Hui Rui. There is a shuttle bus to the terminal. Bus number is M416 and very crowded and these Mainland Chinese push and shove about and they have their manners kept in the ancestral homes up in the mountains. There is no fee to it.
From the GTC , there is a Shuttle to the Metro. It's ahead 12'o clock. Hours between 0700-2200 as the last trains leave about 2230.
Get a SHENZEN TONG aka Oyster/Octopus/EZLink whatever you call it back home. RMB100. The Single ticket machines accept only 5Yuan notes or COINS! Pain in the backside.
Town Shuttle to LuoHu cost about RMB20 or so. Its on your left if I am not mistaken
Bus to Hong Kong is on the right as there is a counter selling them.
Ferry to Macau and Hong Kong Airport is also around there.
Don't take the night flight home as if you arrive after 10, basically, you are screwed.
Taxis cost about RMB200 to LuoHu or about US$40. Red taxis operate where the Special Economic Zone is or about where you see any Metro Station. Anywhere outside, you need the GREEN Taxi.
If you go from Town / City Centre to visit a factory OUTSIDE THE ZONE, you need to alight at SHENZEN NORTH and change to a GREEN TAXI. Otherwise, I always take the Metro to the nearest to the area (usually Northwards to GuangZho from the lake, and Red Line) and get a Green Cab.
Costs is about US$1 or so a KM. So run a guide with Google Maps and you can see for yr self.
Shenzen is an expensive place now,trust me