Taipei is 4 hours behind Wellington
Best overlap: 12:00 PM to 6:00 PM in Wellington is 8:00 AM to 2:00 PM in Taipei.
Book within 12:00 PM to 6:00 PM Wellington time (8:00 AM to 2:00 PM in Taipei) and both teams will be at work. The overlap is wide at 6 hours, so you can protect mornings for deep work and still find plenty of meeting time. Seasonal note: Wellington uses daylight saving and Taipei doesn't, so double-check the times in your own months — they can move by an hour.