The original customer service model lacked unified standards, with no standardized control requirements for pre-sale demand recording, project process synchronization, or after-sales issue handling. There was no visual tracking channel for project delivery nodes, customer feedback was scattered among various contacts, resulting in low closed-loop efficiency, easily causing information omissions and affecting the customer cooperation experience. The potential for renewals and referrals from existing customers was not fully realized. To address this, the company has built a full-cycle customer service system that includes pre-sale archiving, synchronized progress during sales, and follow-up visits after sales. It has developed standardized delivery lists and timeliness for customer requests, established customer files and issue ledgers, and achieved closed-loop management of issue registration, assignment, handling, and follow-up, regularly summarizing customer pain points to continuously iterate service plans. After the system was implemented, the response time to customer inquiries and issues accelerated significantly, project delivery progress became transparent and visible, the rate of recurring customer issues continued to decrease, overall cooperation satisfaction steadily improved, and the value of existing customers was continuously activated, helping enterprises steadily expand long-term cooperation resources.