For door-to-door customers, the cooperative institutions in Keke Holding Company will provide consultation and explanation, show them around and provide exclusive discounts, among which the price discount is exclusive to shells. Only after the customer leaves his phone number and clicks "Agree to Call" can the intermediary receive the customer information pushed by the platform, and what is displayed in the information is not the customer's real mobile phone number, but a virtual number. If the customer browses other pages on the Shell APP or agrees to call again, the customer's information may be randomly pushed to other staff in other intermediary stores, and the customer cannot contact the previous staff through the virtual number.