During the Republic of China, Chen Huidu, as a military advisor, met Shan Manfeng, a spy who had just returned from undercover service. He had sworn that he would never fail in hiding. However, an accident occurred during his last latent mission in the early days of liberation. Shan Manfeng was discovered. At the last moment of his life, he wrote a letter and asked someone to send it out...
Purpose: Patriotism