Hanoi is 1 hour behind Shenzhen
Best overlap: 9:00 AM to 6:00 PM in Shenzhen is 8:00 AM to 5:00 PM in Hanoi.
Both teams are at their desks between 9:00 AM to 6:00 PM in Shenzhen and 8:00 AM to 5:00 PM in Hanoi. A 9-hour overlap gives you real choice here — early or late in the window both work comfortably.