Spoiler: His body was switched with the real Xu Xin Nian after they both got hit by a truck. Li Pingshi is his real name, he was a beggar on the streets when he stole money from the real Xu Xin Nian. The real Xu Xin Nian chased him down because that was the money he saved up so he can buy his mother medicine and their dinner. (Xu Xin Nian is also poor and never met his bio dad(Xu Jianguo)). And after they both got hit by the car, they both woke up in the hospital with their bodies switched, and on that day Xu Jianguo finally decided to pick-up his second son, not knowing he had actually been switched woth a total stranger. Xu Xin Nian recognised him(Xu Jianguo) and wanted to tell him that he was his real son but the words were only stuck on his throat, no one would believe him for he was not even in his own body.
Okay I don't know if this was explained or not but, was the little brother reincarnated? Because he kept bringing up the part about God giving him a second chance to live.... Can somebody explain this to me