"At that time, I had not realized what it was called to lose, but after she left, I knew that I regretted that I had not spent more time with her, so I was very angry. If I had not loved these books too much, I would have burned my study. Later, I swear, I would never read them again in my life, and the books I collected would be forever. It's because of this promise that I won't allow you to go. If you let me in, it means that my promise has expired. Can you understand?

After listening to Master Jiu's meaning, Guan Yu nodded his head. That's...