As the main manufacturer of mdf doors-internal house doors, Guangzhou Casen Door CO.,LTD carries out a strict quality control process. Through quality control management, we examine and refine the manufacturing defects of the product. We employ a QC team which is composed of educated professionals that have years of experience in the QC field to achieve the quality control goal.. We receive important feedback on how our existing customers' experience Casen brand by conducting customer surveys through regular evaluation. The survey aims to give us information on how customers value the performance of our brand. The survey is distributed biannually, and the result is compared with earlier results to identify positive or negative trends of the brand.. We pride ourselves with outstanding services that make our relationship with customers as easy as possible. We are constantly putting our services, equipment, and people to the test in order to better serve customers at Casen wooden door. The test is based on our internal system which proves to be high efficiency in the improvement of service level..