Detailed Answer
After-sales evaluation: 1. Warranty period (LDER 1 year + 2-year trade-in, XINGJIA 1-2 years); 2. Response time (4-hour response / 48-hour on-site); 3. Service network (localized); 4. Spare parts supply (fast-wear parts in stock); 5. Technical support (selection/installation/training); 6. Repair cycle (3-7 days); 7. Extended warranty/recycling policy. Write after-sales terms into the contract and compare before choosing.
| Warranty | Duration + trade-in |
| Response | Time commitment |
| Spare parts | Stocked supply |
Note:Put after-sales terms in writing — verbal promises are invalid.