Welcome to Logistic Part, to have a general understanding about this part, please take at look at frontend:

The Logistic's content:

To know more about how those modules are created, please move to backend for more information. Firstly, we need to know the position of Module Logistic in backend

In administrator, please go to Components -> K2 - > Items. Then choosing Service in the Select Category Field

All of the Articles on Frontend is called from here.