"Floating Image Pearl!" After Duan Ling Tian claimed ownership of the Spatial Ring that belonged to Shi Lei, the Sixth Prince of the Cloudy Rock Celestial Kingdom, he discovered a few Floating Image Pearl in it. He chose one of them based on the mirror images shown.
The mirror images were not long, but it clearly showed Duan Ling Tian and Huan'er's appearance. Huan'er was not wearing a hat or a veil so her beautiful face that made the surroundings paled in comparison was on full display.
'So that's why the Sixth Prince of the Cloudy Rock Celestial Kingdom kept staring at Huan'er even though her face is concealed. As it turns out, he has already seen her face through the Floating Image Pearl that Nangong Li had recorded.'