国产精品久久久久精品三级_亚洲精品偷拍无码不卡av_亚洲va国产va天堂va久久_免费人成年激情视频在线观看

— The pursuit of DATAI is to provide customers with high quality, efficient and professional after-sales service.

1. The company has a technical support center to provide strong technical support for customer services and related products, and we provide long-term technical consulting services for customers free of charge. We adhere to the principle of customer first and keeping promise. The company promises to reply to users' questions within 24 hours.

2. The company has 3 offices in Henan, Hebei and Fengxian respectively, and 36 prefecture-level regional distributors to provide products and accessories support for customers.

3. The company also makes follow-up phone call and door-to-door return visit to customers on a regular basis.