Questioning Li Er at the Beginning

"When I traveled through Zhenguan, I wanted to be a quiet and beautiful man. However, my predecessor actually asked in public: 'Did the Supreme Emperor... Really give up the throne voluntarily?' The court was dead silent, and Li Shimin's smile froze on his face. At that moment, I knew that either my name would go down in history, or... I would be buried in history." Why on earth is this idiot asking this? !