Emperor Xuanyuan gave a bitter smile, "Mystic Girl, why must you do this? Leaving Fire Cloud Cave wasn't easy for me. Let's keep it quiet, I sneaked out this time."
Previously, Ji Changsheng had once invited Emperor Xuanyuan to appear at Wuzhuang Temple when attempting dual cultivation of the Ginseng Fruit Tree and Flat Peach Tree. That time, Ji Changsheng sent out an open and official invitation, which had a clear origin and consequences, so Emperor Xuanyuan's outing was normal and his actions bore no negative impacts.
However, in other cases, the Three Emperors leaving Fire Cloud Cave privately was a serious diplomatic incident with massive political implications.
If the current Tang Emperor learned that Emperor Xuanyuan left Fire Cloud Cave without reason, it would likely cause unrest.
Once Emperor Xuanyuan's movements were exposed, he might even face censure.