There is no standard 8-to-6 overlap. Someone joins early or late.
Given Brasília is 11 hours behind Shanghai, the realistic answer is that there's no convenient shared slot during normal business hours. Catch the edges of the day: the last hour for Shanghai or the first hour for Brasília is usually the least painful option.
What is the time difference between Shanghai and Brasília?
Brasília is 11 hours behind Shanghai.
What are the best overlapping working hours between Shanghai and Brasília?
Unfortunately, there are no standard overlapping working hours (8 AM to 6 PM) between Shanghai and Brasília. You will likely need to schedule meetings outside of regular office hours.
How many hours overlap between Shanghai and Brasília during a typical workday?
Unfortunately, there are no overlapping work hours. Someone will usually need to join earlier or later than a normal workday.
Does Daylight Saving Time affect the time difference between Shanghai and Brasília?
Neither Shanghai nor Brasília observes Daylight Saving Time, so the time difference remains consistent year-round.