### Chinese: 4.定制产品非质量问题不予退换货。
### English: 4. Customized products are not <v>returned</v> for non-quality issues.
### Errors: There is a major accuracy/mistranslation error at "returned" within <v></v>.

### Improved English: 4. Exchange or return of customized products is not supported unless there is quality issue.
