非价格竞争下，产品保修是售后服务的主要内容。
Guarantee is the main point of service under non-price competition.
售后服务：一年内出现质量问题包换，终身保修。
After-sales service: quality problems occur within one year replacement, lifetime warranty.
售后服务：质量问题，一年包换，三年保修。
售后客服24小时内响应，一年保修，终身维护。
Customer response within 24 hours, one year warranty, lifetime maintenance.
售后客服24小时内响应，一年保修，终身维护。
Customer response within 24 hours, one year warranty, lifetime maintenance.
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