hong kong to Zhongshan?

My flight will arrive hong kong at 8pm, and I want to get to Zhongshan on the same day. Is there is boat from hong kong to Zhongshan after 9pm? when is the last boat leave hong kong? how long does it take to go from hong kong airport to the ferry terminal? what is the cost for a one way ticket? do I have stay overnight in hong kong? do I have to make a reservation? is there a website where i can make a reservation? what is the earliest ferry to zhongshan?
thanks.