A good PCB manufacturer, of course, needs good service. The purchase of PCB needs to involve various issues, such as product process, product use, product warranty period, etc., and a perfect service system is needed. And we can communicate with the manufacturer about the pre-sales service. Can we give detailed product introduction to the customer? Can we be patient and solve customer problems quickly? After - sales service is to see if the manufacturer can provide package replacement, warranty, technical guidance and other possible problems in the later period to resolve.