The company employs senior Marine book experts, not only can timely and accurate to provide customers with Marine books, but also to provide customers with related technical consulting services; The company employs a number of professional map changer and sales personnel to ensure timely and correct revision and update of nautical books; In order to ensure the quality of service and management, our company has established a quality management system and passed the qualification certification of Beijing Zhongrunxing Certification Co., LTD.