Many people will have a misunderstanding of drug clinical trials, thinking that they are mice, but this is actually not the case. In fact, there are two types of clinical trials of drugs in China: one is the clinical trial of drugs developed by our own country; the other is the clinical trial of drugs developed abroad before they are marketed in China. At present, the clinical trials of prostate cancer drugs conducted in our hospitals mainly belong to the second type. The advantage is that these drugs have been marketed overseas and have proven to be effective, but are not yet available in China; participation in these drug clinical trials is free of charge.