Who is riding a princess in the world of mortals laughing at? What's the problem? Is that a compliment?

Together, the sentence "Riding a princess in the world of mortals and laughing, no one knows it's litchi" was written by Yang Yuhuan, which is a poem written by Yang Guifei and Du Mu later: "Crossing Huaqing Palace". Yang Guifei, the concubine of Emperor Xuanzong of the Tang Dynasty, likes to eat litchi, but the litchi produced in Nanhai is better than that produced in Sichuan, so she flies around every year, travels thousands of miles, and the horse dies countless times, but the taste of litchi remains the same. This poem is a satire on the dissolute behavior of the Ming emperor. Behind the "Princess Smile", I don't know how many people shed blood and tears. Although the poet did not disclose it, it is conceivable that the two sentences are subtle and wonderful. The word "unknown" is particularly meaningful. Even if outsiders have no reason to know, at least the rider knows and the Tang Emperor knows. It's ironic to say "nobody knows" when someone knows it.