Late at night, An Jing was cultivating the Son of Heaven Method.
After days of continuous meditation and exercise, the time he took to enter the state of the Son of Heaven Method had reduced from an hour to about fifteen minutes.
While still lengthy, it was at a level where he could reflect on it whenever he had free time, making it significantly more practical.
However, An Jing's true intention was to make the Son of Heaven Method viable in real combat.
In other words, he needed to reduce the time to enter the state of the Son of Heaven Method to "in a flash."
If he succeeded, in that flash, An Jing would be able to enter the Son of Heaven Method state and maintain that desireless and egoless state while fighting with others.