30-day guarantee for a new complete machine (the seller is responsible for the round-trip freight). Any non-man-made computer hardware failure that occurs within 30 days after the logistics sign for the computer (except computer failure caused by natural disasters) will be confirmed after contacting the after-sales customer serviceIf it cannot be used normally, you can apply for the replacement of the entire computer (it is required that the appearance should not be scratched or stained. If the appearance is stained, the damaged parts of the computer (computer hardware) will be replaced.)