Banks need to define the scope of business positions when operating outlets. The scope of network lock-in refers to the scope of business positions that banks need to define in order to determine service targets, market positioning and business strategies. Banks need to determine the scope of business posts according to the characteristics of the geographical location of outlets. For example, if the outlet is located in a commercial area, the business location can be locked in the commercial area, and if the outlet is located in a residential area, the business location can be locked in a residential area.