3 days later, Ning had his first day without any classes. There would be another one after 2 more days too, giving him 5 days of total study days in a single week.
Just because he had no class, however, didn't mean that no one had classes at all.
A free day meant Ning did not have to study at all. However, he still had to remain in the academy ground, so he needed to do what he could do to pass some time.
There were 2 things every single student did during these days when they were bored of just sitting in their room.
The first was earning credits. They would do the missions that were given to them and earn credits.
The second thing they did was spend those credits. There were libraries, restaurants, conduit shops, clothing stores, and even an entertainment hall on the front wing of the academy.
Since this was Ning's first week, he decided to earn some credit. Otherwise, he wouldn't feel any good spending the 20 credits he had.