Delhi is 2.5 hours behind Shenzhen
Best overlap: 10:30 AM to 6:30 PM in Shenzhen is 8:00 AM to 4:00 PM in Delhi.
Plan around 10:30 AM to 6:30 PM in Shenzhen, which is 8:00 AM to 4:00 PM in Delhi, to catch everyone during office hours. The overlap is wide at 8 hours, so you can protect mornings for deep work and still find plenty of meeting time.