Budapest is 7 hours behind Shenzhen
Best overlap: 3:00 PM to 6:00 PM in Shenzhen is 8:00 AM to 11:00 AM in Budapest.
Aim for 3:00 PM to 6:00 PM Shenzhen time — that's 8:00 AM to 11:00 AM over in Budapest. Around 3 hours of overlap is enough to work comfortably, as long as meetings don't drift to the end of one team's day. Because Budapest and Shenzhen don't both observe daylight saving, plan to re-check the overlap around March and November.