Shenzhen is 7 hours ahead of Stockholm
Best overlap: 8:00 AM to 11:00 AM in Stockholm is 3:00 PM to 6:00 PM in Shenzhen.
Shoot for 8:00 AM to 11:00 AM in Stockholm; your Shenzhen colleagues will see that as 3:00 PM to 6:00 PM. A 3-hour overlap gives you a workable daily window; aim for earlier in it to avoid clipping the end of someone's day. Don't be caught out by clock changes — Stockholm observes daylight saving and Shenzhen doesn't, so the offset varies by an hour through the year.