The TV series of World War II theme Battle After War is adapted from the prototype of "Gu Shoufu" and reveals the history of nameless heroes before the 1946 Nanjing Trial. Produced by Ciwen Pictures, it is a sister piece of Special Agent Group 5, using the original crew of Special Agent Group 5. For this, Yu Zhen will once again play "Ma Yunfei". Although they are both named Ma Yunfei, the two characters' personalities are very different.