Beijing is 11 hours ahead of Santiago
There is no standard 8-to-6 overlap. Someone joins early or late.
Given Beijing is 11 hours ahead of Santiago, 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 Beijing or the first hour for Santiago is usually the least painful option. The window above shifts seasonally: Santiago keeps daylight saving while Beijing ignores it.