Handling after-sales issues requires communication, registration, verification, processing, follow-up, and archiving for returns and exchanges, not just responding to one sentence, including logistics inquiries, post station situation follow-up, Damage/shortage/missing/wrong shipment/abnormal quality handling, or customer complaint dispute handling, small payment, defect compensation, the purpose is to reduce negative reviews and customer complaints escalation, apologize and comfort customers with problems, avoid negative reviews or conflict expansion. The service scenario will be different in different regions.