It would be great if life was just a big dream without leaving a trace. Then you don't have to be disappointed after waking up from the dream, just pretend that you are drunk.
If he is not an emperor and she is not a queen,
If he was just Zaitan and she was just Chang'an,
Then when she travels through time and space for hundreds of years, she doesn't have to worry about much, she just has a vigorous love.
She is his Queen Longyu, but she just wants to give him peace for the rest of his life.