He also pointed out: it's not necessary to naturalize the giant islanders... because they're too short. If we were to belittle the entire Yunyang Realm's population, we'd lose face after ascension!

[When you encountered him during your inspection of the Yunyang Realm, the innate master of the Martial Kingdom still respected your kindness in imparting your teachings.]

[After you leave the Cloud Realm, near the ascension exit, there are Innate Realm experts from the nearby Taicang City stationed here to prevent Grandmasters from using the "True Essence Refining Technique" to drain the Yuan Crystal Wall and smuggle themselves into the Azure Domain.]

[At the same time, it also warned ascendants not to recklessly transmit the Yuan Refining Technique; it's fine to use it within your own world, but spreading it around... that's completely unnecessary!]

As for why it can't spread, you can understand.

[It's not that the Azure Domain lacks vital energy; with its high concentration, it can still support all humans to complete the cleansing process and achieve a 9.99 times higher aptitude.]

The main reason is "occupational allocation".

Throughout the Azure Domain, each city possesses a well-established talent cultivation mechanism. Geniuses with genuine martial arts talent, once they demonstrate exceptional abilities, will receive "Marrow Cleansing Pills" to help them undergo a complete transformation and embark on the path of martial arts, even if their aptitude is only twice that of an average person.

The common people need to engage in commerce, farm, and maintain the social structure... Once they all learn the True Essence Refining Technique, their aptitude will be nearly ten times greater, who would have the mind to do anything else?

[Above the Innate Realm, martial arts prowess is almost entirely dependent on aptitude. A aptitude 2.5 times that of a Grandmaster is barely enough to break through, while nearly 10 times means it's effortless—anyone can do it!]

[By then, everyone will be a Grandmaster. Who would want to engage in commerce, farming, or basic tasks? As a result, a bunch of people lacking in comprehension and talent will be stuck at the Grandmaster level for their entire lives, not very useful in the war zone, and their vitality will be pitifully fragile.]

[Grandmasters eat a lot of rice, and if they don't eat rice, they have to rely on their martial arts to absorb vital energy to survive... If the entire human race undergoes a cleansing process, it won't completely drain the Azure Domain, but if the entire human race becomes Grandmasters and relies on vital energy to sustain life, the Azure Domain really won't be able to hold on, and will enter the "Primordial Desolation" era.]