arriving at hong kong airport at 10.PM , how i can go to huimei hotel, changping,dongguan?

Well, at that time, there is no bus and ferry service. The only way is to hire a cross-border car, and you need to book it in advance. Here are the numbers of different car rental operators: 852 2261 2169 (CTS), 852 3760 0888 (Eternal East ). Try this!

Or stay near the airport for a night and take the cross-border coach to the destination next morning.

please can you tell how much will be the fare if we use a rent car cross border , whats the email, or website for renter car ?

I just know the Yuegangtong Car Rental Company also offers such service. The fare is 3,000 to 3,400 HKD.
The e-mail is sz28000088163.com. And the phone number is 0755-28000088. Try to contact them for more info. Good luck!