Datang: at the Beginning, He Mistakenly Identified Li Er as His Father!

Li Mu traveled through the Tang Dynasty for ten years. His father went out on business thirteen years ago, but ten days ago he received a letter asking for his return. This year, there was a severe drought in the world, hungry people were everywhere, and bandits were rampant. Li Erwen went on patrol in disguise to show sympathy for the people. When Li Er was attracted by the waterwheel and knocked on Li's door, Li Mu thought his father was back. As soon as he entered the hall, Li Er was stunned by the wind powered waterwheel model. After that, Li Er asked Li Mu about national affairs every once in a while. Li Mu couldn't find peace in his heart. Why would he be promoted every time he said it? Until one day, Li Er's voice sounded in the court: Good son, look who I am?