Xu Ping'an lives in everyone's favor, but he feels sorry for his half-brother Song Zhi who lives under someone else's roof.
Xu Ping'an was Song Zhi's ray of light when he was a child, but when he grew up, he became the biggest villain Di Ting
The cold-faced detective Song Zhishou could abide by the law, but he could not abide by the glory of his childhood.
Intention: The eternal conflict between emotion and law