Ji Bai continued: “ Ye Qiang has bad temper and is impulsive, he has a history of violence. It’s likely that he accidentally killed Ye Zi Xi, then used the Swiss knife to create the wounds like the “blade case” to mislead the investigation of the police. On the night of the incident, you and he talked on the phone to discuss work. Perhaps Ye Qiang told you about what happened, since he left such clear traces, you had to find a way to save him, and need to use real paper knives to create the wounds to cover up the wounds made by the Swiss knife. Where can you find a paper knife in the middle of the night? You’re in charge of the company’s finance; going into the storage room to get paper knives is as easy as turning a hand.