This company has only a few regular customers. If old customers suddenly change their decision to cooperate with your company, your company will face a situation of reduced business. In the long run, if you don't add new customers, your company will face the risk of not running normally. Fixed customers refer to a certain range of customers or a few fixed customers. If a customer belongs to a person's regular customers, it means that these customers are in a fixed state. No matter what happens, these customers basically belong to the existing ones, and they are fixed there like nails.
A company has only one customer. If this customer's commission is large, then a company can make all its profits bigger and stronger by relying on this customer first.