Yu Xinjiang, an underground worker, secretly found and conveyed the instructions of the leaders of Chongqing Underground Production Party, demanding to raise money to help the workers in the artillery factory of the Yangtze River Ordnance General Factory, and also established a backup liaison station in the sand magnetic area. After the victory of the Anti-Japanese War, Chiang Kai-shek's government produced a large number of weapons, expanded the arsenal and occupied the workers' dormitory area of the arsenal in order to launch a civil war. The workers did not move. Last night, they set fire to the workers' dormitory. Zhigao Pu is the accounting director of Dafeng Bank. He once secretly participated in the revolutionary work and served as a member of the Shaci District Committee of the underground production party. After receiving instructions, he first used his work to raise money, and then set up Shapingba Bookstore in Shapingba Street as a backup liaison station for the underground party. Chen Songlin is a worker and underground producer of the Changjiang Arsenal. He often went to Chongqing University to send books and periodicals to Huawei, a college student, and witnessed the scenes of students' struggle against civil war and persecution and Kuomintang spies. He also met Li Jigang, editor-in-chief of the student publication Comet and a law student. A young man in rags and pale face often comes to the bookstore to read books. I soon got to know him, knowing that his name is Zheng, and he is Li Jigang's cousin, pursuing progress, and now he is unemployed.
100 word: Yu Xinjiang, an underground worker, secretly found and conveyed instructions to set up a standby contact station in the form of a bookstore, with him as a liaison. Because of Zhigao Pu's blind advance and Chen Songlin's inexperience in fighting against the enemy, he was used by Kuomintang agents.