Hong Kong 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 Hong Kong.
Schedule calls for 8:00 AM to 12:00 PM in Bucharest — your colleagues in Hong Kong will be online from 2:00 PM to 6:00 PM. 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, Bucharest observes daylight saving and Hong Kong doesn't, so this window shifts by an hour for part of the year — recheck it each spring and autumn.