Hong Kong airport to Xiamen by bus or train or ship

I heard there is a direct bus, but it starts from the North Point and I do not think you can catch this bus after 5pm.
In my opinion, it is suggested to go go Shenzhen Luohu area first and from Qiaoshe Bus Station in Luohu District, Shenzhen, you can find the direct bus to reach XM. The last bus is at around 2220, so i am sure you can catch it.