As a fan of Legend of Dance, the BG article can only be written by Lu Jinjiang, Haidonglai x Yueshuangxing (actually it is clearly Yueshuangxing x Haidonglai)
The time is set after Xianle, and history develops normally, which is neither contrary to nature nor imaginary.
The author is definitely a big fan of Mr. Yue, and he takes these eight words of Chang'an's character, strength, loyalty, bravery, and body into his heart!
Don't abuse your body or mind, let's happily fall in love 23333
Intention: