Longxing quality engineers are involved in every stage of a project. Reports are submitted at each stage. At prototyping, we submit Advanced Product Quality Planning（APQP）, like PPAP, Solidification Simulation; At batch production, physical and chemical analysis reports, non-destructive testing reports, dimensional reports etc. At aftersales stage, Corrective Action Report (8D). These reports are passed to customers in paper or electronically. We also make customized documents to fit customer's requirements. Longxing quality team is looking forward to serve you.