Hong Kong is 13 hours ahead of Medellín
There is no standard 8-to-6 overlap. Someone joins early or late.
With 13 hours between them, Medellín and Hong Kong have no overlap during standard business hours — by the time one team logs on, the other has logged off. The usual fix is an early start for Medellín or a late finish for Hong Kong — pick whichever team has more flexibility.