Beishan Deep Forest

Late autumn of 1935, Nanjing. A young man from Fengtian walked into the reporting office of the Fuxing Society Secret Service. His name is Lin Shen, he is twenty-three years old, has a Chinese character face, stands up straight, and fills out the form as steadily as a ruler - no matter how you look at it, he is just a peripheral probationer who comes to beg for a job. No one knew that the case of his pocket watch was engraved with two characters smaller than a grain of rice: Beishan. No one knew that he had embroidered a half-inch long gray mark on the inner edge of his cuffs - that was the code name he gave himself: Gray Bird. No one even knew that he was holding a piece of rough-edged paper in his arms that his father had stuffed into his hand before he died. There were only four words on the paper - Beishan is not alone.