Soft mirror, which means soft ureteroscope, is also called soft ureteroscope, a new type of mirror compared to hard mirror. The rigid mirror is a one-piece mirror with steel structure, the length and angle of view are fixed and cannot be rotated, so there is a certain blind spot in the field of view. The soft mirror is a whole-body fiber optic structure with soft texture, and the head can be bent up and down from left to right, and the visual angle is about 170 degrees. Compared with ureteral rigid mirror, it can greatly improve the field of view and reduce the blind spot, and the head can be bent to increase the flexibility of operation, so that it can deal with lesions in the bladder and pelvis that cannot be reached by rigid mirror, and it can obtain biopsy and do laser surgery under the mirror.