Clinically, some cancers are called happy cancers, such as bladder cancer, because bladder cancer has four “happy points” compared with other malignant tumors, namely, early appearance of early symptoms, slower development, higher cure rate and better treatment effect. 1. Early appearance of early symptoms: bladder cancer will show some obvious clinical symptoms in early stage, such as hematuria, frequent urination, urgent urination and painful urination. The symptoms of bladder cancer, such as hematuria, urinary frequency, urinary urgency, urinary pain, etc., while most of the symptoms of other cancers are not obvious and are usually late when found; 2. Slow development: after the symptoms of bladder cancer appear in the early stage, the disease will not continue to develop or develop more slowly after active treatment; 3. 4. Higher cure rate: for different tumor stages and different pathological stages of bladder cancer, the cure rate is usually higher after cystoscopic bladder tumor electrosurgery or holmium laser resection of bladder tumor, so it is recommended that bladder cancer patients should be treated as early as possible if bladder cancer is detected at an early stage.