We follow a uniform inspection after each process step is completed, and the completion of each step and process must pass the inspection before it can be sent to the next workshop or production line, which includes incoming material inspection, structural verification, load-bearing test, Anti-collision test, packaging test, etc.

SD’s unique secondary QA control process, that is, each process and production process has passed the inspection during the production line circulation process, and our quality inspection team will follow the comprehensive quality inspection process before the final shipment by full or random inspection again. the finished bulk goods can be transferred to the logistics and delivery department until the second test is all qualified.