Bloody Spy (Spy War)

During the second cooperation between the Kuomintang and the Communist Party, Someone stole confidential documents from the military government building. And the content of the file is just a bloody handprint! What is the origin of the bloody handprints? What secrets does it hold within itself? What did a group of doctors verify from the bloody handprints? The war between the Central Government and the Military Government, Why is there a woman mixed in? And what is the relationship between this mysterious woman and the bloody fingerprints? "The Bloody Spy" will reveal layers of mystery for you! Ps: This is my first time writing a spy story, so please support me!