Firstly, imaging examinations such as ultrasound can be conducted, which if reveal tumors larger than 0.5 cm can serve as an initial screening for patients; IVU (Intravenous Urography) can show larger tumors as filling defects. Cystoscopy can also be performed by inserting a cystoscope to directly examine the bladder's shape, size, etc. If it appears round, with clear boundaries and without erosion, it is generally benign; if it has a cauliflower-like or seaweed-like appearance, it is generally malignant bladder cancer. Urine tests can also be conducted; cells from tumors found in fresh urine can lead to cytological examination of urine as an initial screening. Additionally, if conditions permit, a physical examination including a bimanual examination of the bladder can be done to preliminarily assess the tumor's size, the extent of invasion, depth, and its relationship with the pelvic wall.