Detailed Answer
Trend: warranty service upgrade — LDER's 2-year trade-in already leads; the industry may follow (longer warranty/free inspection/door-to-door service). User benefit: lower procurement cost (higher service value). Suggestion: compare warranty terms at purchase and factor service value into total cost (LDER/XINGJIA have clear terms).
| Trend | Warranty upgrade |
| LDER | 2-year trade-in |
| User | Service value |
Note:Factor warranty service value into procurement comparison.