Longjia Security Door Co., Ltd., established in 1996, is located in Tianjin City in China. We employ over 400 different experienced staff and workers and 20 technical personnel. We can supply different kinds of security doors and are specialized in research and development. Our company has passed the ISO9001 quality authentication. "Longjia" now has become a famous brand and our products are well known within China. We have won 20 national patents in the past few years. We firmly believe that every customer will be satisfied with our timely and excellent services. If you are interested in any of our products or would like to discuss a custom order, please feel free to contact us. We are looking forward to forming successful business relationships with new clients from around the world.
