Guangzhou Casen Door CO.,LTD strictly selects the raw materials of mdf doors-cheap wood doors. 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.. With the rapid globalization, delivering a competitive Casen brand is essential. We are going global through maintaining brand consistency and enhancing our image. For example, we have established a positive brand reputation management system including search engine optimization, website marketing, and social media marketing.. In order to deliver satisfactory service at Casen wooden door, we have employees who really listen to what our customers have to say and we maintain a dialogue with our customers and take note of their needs. We also work with customer surveys, taking into consideration the feedback we receive..