"I am the princess of this country. This means that when a foreign enemy invades the territory, I can take off my gorgeous palace clothes and put on my armor, go to the battlefield to kill the enemy and protect my people. Instead of just enjoying their respect and offerings when I am in Haiqingheyan "I, the eldest princess, Li Yi, swear in the name of the Dajiang royal family to defend this country until the last drop of blood is shed." When one day, you guard this prosperous palace and think about the full moon outside Yumen Pass, will you feel lonely?