Guangzhou Casen Door CO.,LTD strictly selects the raw materials of mdf interior doors-soundproof door. We constantly check and screen all incoming raw materials by implementing an Incoming Quality Control - IQC. We take varies measurements to check against collected data. Once failed, we will send the defective or substandard raw materials back to suppliers.. We differentiate ourselves by enhancing the awareness of Casen brand. We find great value in enhancing brand awareness on social media platforms. To be most productive, we establish an easy way for customers to connect to our website seamlessly from the social media platform. We also quickly respond to negative reviews and offer a solution to the customer's problem.. Our dedicated and knowledgeable staff have extensive experience and expertise. To meet the quality standards and provide high quality services at Casen wooden door, our employees participate in international cooperation, internal refresher courses, and a wide variety of external courses in the areas of technology and communication skills..