Based on the advanced technology from abroad and designed solely by our company, KXS type upper digestive tract fiberscope is a product successfully developed through the implementation of the torch project during the 8th five year plan made the national committee of science. It features wide field of view, high resolution, easy insertion and operation and is suitable for the observation, diagnosis and treatment of disease focuses in the esophagus, stomach and duodenum. In addition, it is a desirable device for the pathological research on the upper digestive tract and post operation examination. It was awarded the certificate of high and new technology product and the national keynote product certificate in 1999, national new product certificate in 2000, and provincial excellent and new product in 2001. Characteristics: Excellent optical system: Long depth of field, wide angle of view, high resolution, bright and sharp display Advanced operation system: Comfortable handling, convenient operation, accurate and wearable Patient friendly insertion system: Segmentally hardened and flexible with fine performance of insertion Complete auxiliary system: Biopsy channel, water supply, air supply, sucking part and fine light source