From HK airport to shenzhen with bus

Dear sir we arrive to HK air port at 23:00 o'clock at 13 Aug , you should be know to point, the transit time only until 24:00 13Aug, and i have only visa of china and don't have visa of HK, i ask for you, from HK airport to Shenzhen have bus, Pls. tell me that is possible we are use from this service, i am from Iran, Pls. check this point for me you should be know
if i will arrived until 18:00 no problems we are use ferry in air port of HK, but this service close at 21:00 and no service,
Pls. tell me if i am from Iran maybe use from Bus HK airport to Shenzhen that is possible for us
Thanks
Best & Regards
Bahram