In order to support the Central Soviet Area in breaking the Kuomintang’s military "encirclement and suppression" and economic blockade, the Central Committee of the Communist Party of China decided to establish a red communication line from Shanghai to the Soviet Area via Hong Kong and Shantou.

Zou Zuo Ren is the head of the Bogongao station of the transportation line. Together with other large, medium and small transportation stations, he is carrying out the top secret mission of transporting personnel and scarce supplies to the Soviet area, and also transporting funds and intelligence from the Soviet area to the Shanghai Party Central Committee. Under the leadership of Zou Zuo Ren, the traffic men battled wits with the enemy.

Under the rigorous investigation of the Kuomintang military commander with Cao Rui Ying as the station leader, several small stations were destroyed, but the traffic men who were loyal to the party would rather die than surrender, protecting the party's secrets with their blood and lives. In the arduous task of escorting more than one hundred delegates from all over the country to Ruijin to participate in the Second Chinese Soviet Congress, Zou Zuo Ren and others sacrificed their heroic feats to ensure that all delegates were escorted to Ruijin unscathed, ensuring the meaning. The major Second Congress of the Chinese Soviet was held as scheduled.