北京賽德車門制造有限公司成立于1997年，系研發、制造城市公交客車、旅游客車、團體客車、機場擺渡車、豪華游輪等乘客門總成的專業化廠家，擁有一批高素質的技術、管理、銷售人才和良好的工作環境，賽德多年來始終遵守“科技為先，品質為本”的宗旨，憑借著高品質的產品和一流的服務，贏得了國內外廣大用戶的一致認可。

Beijing Sade Bus Door Manufacturing Co., Ltd. was established in 1997. It is a specialized manufacturer of passenger door assemblies for urban buses, tourist buses, group buses, airport shuttle buses, luxury cruise ships, etc. It has a group of high-quality technical, management, and sales talents and a good working environment. Saide has always adhered to the principle of "technology first, quality oriented" for many years, and has won unanimous recognition from users at home and abroad with high-quality products and first-class services.