The TV play After War Based on World War II adapted from the prototype of "Gu Shoufu", revealing the nameless heroes behind history before the 1946 Nanjing Trial. Produced by Ciwen Pictures, it is a sister piece to The Special Agent Group 5 which uses the same original cast. For this reason, Yu Zhen will once again act as "Ma Yunfei". Although they are both named Ma Yunfei, the two characters' personalities are very different. The director and screenwriter had to work hard to distinguish between the two. The Ma Yunfei in Number 5 is debonair and carefree with a more unconventional personality who handles matters rather casually. This Ma Yunfei is much more mature. As long as he believes in something, he will be very persistent and determined.