looking for hotel close to shen zhen airport

i going to SZ then going to hong kong to renew my visa but my flihgt will be land night. so i think i going to take this time in SZ. any hostel or backpacker close to airport and safe either. then how long distance is from SZ airport to Lou HU PORT. also some one here get a renew visa in hong kong?? it is complacated? easy? please help me with this item