The Strongest Teacher in the Tang Dynasty

Liu Yi traveled through time to the Tang Dynasty and obtained the most powerful teacher system. Cheng Yaojin: Liu Yi, for the sake of our friendship, just accept the two silly sons at home as your disciples. Reincarnation is not a problem. Changsun Wuji: Xiao Yi, as long as you tell me how to smelt steel, I will become your teacher and give you 50% of all my family's business shares. Li Jing: Mr. Liu, please tell me about modern warfare and information warfare. Li Shimin: Liu Yi, I am willing to worship you as my teacher, as long as you can completely solve the hunger pain of the people. Liu Yi, everything is easy to say, just take your time! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.