Karachi is 3 hours behind Beijing
Best overlap: 11:00 AM to 6:00 PM in Beijing is 8:00 AM to 3:00 PM in Karachi.
Aim for 11:00 AM to 6:00 PM Beijing time — that's 8:00 AM to 3:00 PM over in Karachi. Karachi is 3 hours behind Beijing, but you still share a generous 7 hours of overlap, so scheduling is easy and there's room to move a meeting when you need to.