I Am a Suspect in Killing Myself

I, Qin Feng, a senior criminal police officer, woke up and became the number one suspect in the murder of "myself". This body belongs to Gu Yuan, a scumbag from the police academy. He is thin, fair, and extremely weak. The person interrogating me on the other side was my ex-girlfriend, Lu Xiaming, the deputy captain of the criminal investigation team. She could lift me up with one hand. My student card fell next to my own body. How to break this game?