"Fact finding" is the result of the lawyer's repeated study of the case file, and it is the facts captured through the details of the evidence, rather than reasoning. Simply put, like a shredded map of the Qingming River, dozens of witnesses each have only a little of it, and need to find the fragments and piece them together to reproduce it. Once the puzzle is successful and new facts are established, the entire allegation is shaken or subverted. Facts have found that it is easier said than done, and it is necessary to review and deliberate back and forth between the lines.