Shanghai is 6 hours ahead of Rome
Best overlap: 8:00 AM to 12:00 PM in Rome is 2:00 PM to 6:00 PM in Shanghai.
The hours that work for both Rome and Shanghai are 8:00 AM to 12:00 PM (Rome) and 2:00 PM to 6:00 PM (Shanghai). Shanghai is 6 hours ahead of Rome, leaving about 4 hours of shared hours — plan recurring calls early in that window to leave buffer. A quick caveat — Rome's clocks move for daylight saving and Shanghai's don't, so the times here are right for only part of the year.