Well, I don't work for Shenzhen Airlines, but I do live about 50 miles South of the border and work for brand "CX". What do you need to know - specifically?
I CAN tell you that it's a growing, working-class city of about 8 million.
Serious traffic congestion.
Heavy industrial pollution - air, water and sea.
Cost of living cheaper than HKG, but not really crazy cheap. More like comparing SFO with PHX.
Housing is cheaper, but there are expat traps - beware what you commit to.
Internet traffic is heavily censored and monitored.
English is not widely spoken, you WILL have to learn passable Mandarin to get around efficiently.
There is a very good Metro system.
Buses are plentiful and cheap, but you need to be able to speak (and read) Mandarin to use them effectively.
TV channels are monitored on a time delay system. If "they" don't like whats broadcast, you won't see it.
On the surface, nothing insurmountable. The FEDEX SZX based guys are (to a man) all living in HKG. I guess that says it all.