Brussels is 6 hours behind Taipei
Best overlap: 2:00 PM to 6:00 PM in Taipei is 8:00 AM to 12:00 PM in Brussels.
For a call that suits both sides, look at 2:00 PM to 6:00 PM in Taipei / 8:00 AM to 12:00 PM in Brussels. Around 4 hours of overlap is enough to work comfortably, as long as meetings don't drift to the end of one team's day. Finally, Brussels observes daylight saving and Taipei doesn't, so this window shifts by an hour for part of the year — recheck it each spring and autumn.