FROM LUOHU CHECK POINT TO DAPENG

Hello, I'd like to go to Dapeng, help me please, my route is
KH airport => Lantau Island => Central by ferry => MTR to Mong Kok one stop and again MTR blue east rail line to LOWU
after that I'm lost... a taxi to Dapeng or a train?
if a taxi, could you tell me how much the course?
Thanks for your help
kiss from France