Simple is best

Anna was pointing towards a small building complex with a golden dragon embedded in its sign.

It was a trading company, and Jason didn't take long before he comprehended what Anna wanted to tell him.

She might have a different idea than what Jason's mind was forming, but he couldn't help but grin at the thought.

Without wasting any time, he cooked up a plan to be able to enter the fortress-like nurturing grounds.

Taking out the translated version of the neutral body refinement technique that had once belonged to the Doom Crawls, Jason smiled lightly.

In a shrewd move, he deliberately altered the content of a few paragraphs so as to  prevent others from refining their physique further than a certain threshold without causing any issues to the practitioners future body refinement

This threshold would allow the user to barely reach the first stage, but wouldn't allow advancing any further.