Family Letters and Gunpowder Smoke Under the Oil-Paper Umbrella

In Wuhan in 1938, post office clerk Su Xiaotang was responsible for delivering letters home to frontline soldiers, and accidentally met Chen Liwei, a wounded soldier. Chen Liwei retired due to injury, but concealed his identity and silently protected Su Xiaotang. After the fall of Wuhan, the two were separated. Su Xiaotang took Chen Liwei's family letters and found him, and they joined the guerrillas behind enemy lines.