In this case, only NWFB Route 4 is available.
(First trip from Wah Fu: 05:30 + Macau Ferry: about 05:50)
Frequency: every 20 minutes
Source: Citybus & NWFB web page
Therefore, if boardmaster chooses to take MTR to Central, one should transfer to Route 4 (but not Routes 4X or 30X) because Routes 4X or 30X buses may not arrive to Central before 07:00 a.m.
