Taipei is 6 hours ahead of Bucharest
Best overlap: 8:00 AM to 12:00 PM in Bucharest is 2:00 PM to 6:00 PM in Taipei.
For the smoothest call, aim inside 8:00 AM to 12:00 PM in Bucharest, i.e. 2:00 PM to 6:00 PM in Taipei. Since Taipei is 6 hours ahead of Bucharest, the workdays overlap by around 4 hours; 8:00 AM in Bucharest (2:00 PM in Taipei) makes a reliable recurring slot. Note that Bucharest follows daylight saving while Taipei stays put, so the times above drift by an hour seasonally.