In October 2016, 23 to 25, complicated urinary stones on the seminar held in tangshan worker hospital. The meeting gathered the urological department experts all over the country. Ningbo first hospital professor guo-hai xie, step-by-step illustrates the percutaneous renal puncture holmium laser lithotripsy. Dahua holmium laser equipment under professor xie the exquisite technology, such as the skillful craftsman, perfect to play the effect of holmium laser, rave reviews