Who says sleep is not spiritual practice?

Everyone knows that Jiang Qingyu, the fourth son of the Northern Palace, is a sick child. He sleeps on the couch for nine hours a day.
He didn't study literature, martial arts, or listen to music, so he was nicknamed "Mr. Wolong".
However, no one knows that people can actually practice in their dreams.
……
One night, Jiang Qingyu fell asleep on a couch in the palace.
At the same time, in the capital thousands of miles away, some people reported to the officials, claiming to have seen Young Master Wolong behead a ten-zhang-high golden dragon with one sword!
At the moment when the dragon fell, the Qingtian Supervisor in the capital watched the celestial phenomenon at night, and saw the Xuanwu devour the crape myrtle.
On the second day, an urgent report appeared in the court of Chu State.
There are only four words on the emergency report:
Reject the Northern King's rebellion. ...