Mr. Peijie Cheng who is the director of Security Bureau in Haerbin city lead his father Mr.Cheng come to professor Yang's clinic, he had BPH 3 degrees and  retention of urine. After take the  medicines prosfessor Yang invented for 28 days,  the catheter was pulled out, the hyperplasia prostate reduced after 120 days. The old man appreciated professor Yang for helping, he presented a copper plaque and wrote:” Generation of highly skilled doctor, remove from illness with the special formula.” The medicines prosfessor Yang invents cure the retention of urine without operation, which is original creation in clinic.