The practice of controlling thoughts is actually quite simple. It's about exhausting your thoughts every time until you reach the point of a splitting headache, which indicates mental exhaustion. At this point, you need to rest, drink some water, and eat something, then you can recover after a short break.
Each time you recover, your mind becomes a bit stronger. However, this kind of training is very challenging in terms of willpower; people with weak willpower simply cannot endure it.
After a winter of practice, Hua Jin has gone from being unable to withstand the feeling of a splitting headache to handling it without even changing her expression.
But today's high-intensity practice was a first for her.
In the past, she rarely practiced until she had a splitting headache, mainly because she wasn't inclined towards self-torture.