The success or failure of a case is to speak with evidence. Most of a lawyer's job is actually to help his client find a needle in a haystack. This process is the most critical and brain-consuming, and it can best reflect the professionalism, experience and value of lawyers. Finally, the lawyer gave the client a prescription for the right medicine, which is called the list of evidence. Whether the evidence list is made accurately or not determines the success or failure of the case.