How to implement in the ordering process, first the choice of the city, then the point?

Question

1C-Bitrix

Good afternoon.
When choosing - Pickup at the second stage.
At the third stage, the list of items is a continuous list.
You must first select the city, and then a specific store.
How to implement?

Answer 1

Either by setting the component, or by refining it
. How exactly to refine it depends on how it works now.