Shadows of Blood (Espionage)

During the second period of cooperation between the Nationalists and Communists, someone stole a classified document from the Nationalist government building. The document contained nothing but a bloody handprint! Where did the handprint come from? What secret does it conceal? What did a group of doctors uncover by examining it? Why is a woman caught up in the struggle between the Bureau of Investigation and Statistics and the Military Statistics Bureau? And what connection does this mysterious woman have to the bloody handprint? Bloodstained Spy Shadow will lift the veil on the mystery! P.S. This is my first spy novel, so I hope you’ll give it lots of support!