Islamabad is 3 hours behind Shanghai
Best overlap: 11:00 AM to 6:00 PM in Shanghai is 8:00 AM to 3:00 PM in Islamabad.
Keep meetings inside 11:00 AM to 6:00 PM in Shanghai — that maps to 8:00 AM to 3:00 PM in Islamabad. Despite the 3-hour difference, a 7-hour overlap keeps things simple and gives both teams breathing room.