Recently, Xie Hua, director of our urology department, successfully performed pyeloplasty for a child with hydronephrosis by applying the minimally invasive technique of retroperitoneoscopy. So far, our hospital has made a qualitative breakthrough in the field of urological laparoscopic technology. According to his parents, the child was examined for bilateral hydronephrosis in his mother’s womb, and after birth, the right hydronephrosis was found to be significantly better, while the left hydronephrosis was more obvious, but the local doctor suggested close observation. In May this year, when Xiaoheng’s parents reviewed their child at the local hospital, they suddenly found that the condition had worsened and the left hydronephrosis had worsened, and the kidney function had been seriously damaged. After a detailed examination, combined with the specific situation of the child, they decided to adopt a posterior laparoscopic minimally invasive treatment plan, and after more than four hours of intense surgery, they successfully unblocked the ureter, which was almost obstructed. He has now been discharged from the hospital. According to Xie Hua, director of the Department of Urology, laparoscopic technology has the advantages of less trauma, less bleeding, less pain and faster post-operative recovery, etc. At present, it has been widely used in adult surgery, gynecology and urology, but in pediatric surgery, especially pediatric urology, the technical difficulty is more demanding because of the individual differences of children. On the one hand, the technical difficulties such as suturing in plastic surgery are greater compared to resection surgery, and on the other hand, the posterior laparoscopic technique does not go through the abdominal cavity, avoiding the numerous complications that may arise from entering the abdominal cavity, but the operating space is smaller and more difficult. However, as a urological medical staff, Director Chen Fang and Director Xie Hua have taken the responsibility of alleviating the pain of children, actively exploring the surgical mode, utilizing and developing new laparoscopic techniques. So far, Director Xie Hua has completed more than 100 cases of various minimally invasive pediatric urological laparoscopic surgeries, providing better medical services for urological children. The success of this case reflects that the Department of Pediatric Urology of our hospital, as the “Diagnostic and Treatment Center for Congenital Genitourinary Malformation Surgery” of Shanghai Jiaotong University established in 2009, is already in the leading position in the field of laparoscopic technology in pediatric urology in China.