The TV play "Battle After War" based on the theme of World War II was adapted from the prototype of "Gu Shoufu" and revealed the history behind the nameless heroes before the 1946 Nanjing trial. It was shot by Ciwen Film and Television. It is a sister piece of "Special Agent Group No. 5". The original team of "Special Agent Group No. 5" was used. For this, Yu Zhen will once again play the role of "Ma Yunfei". Although both are called Ma Yunfei, the two characters' personalities are very different. The director and screenwriter also worked hard to distinguish between the two. The Ma Yunfei in "No. 5" is debonair and has a more free-spirited personality, dealing with things more casually, while this Ma Yunfei appears more mature. As long as he believes in something, he is very persistent and sticks to it.