Well, the trial was an option, and the Academy was another, but other than that… it would be quite hard to gather information. Just look at the way this world was set up!
The majority of the world was still rural, running under feudal code with kings and emperors. Although many normal people had heard of cultivators before, it was just like the legends one would hear passed around in ordinary villages in the modern day! Whispers of 'immortals' and 'good luck deities.'
From this, it was easy to tell that knowledge about cultivation wasn't commonly spread out and could even be considered a secret that was monopolised by a select few. After all, if one were to really take a tally of population, although the ratio of people born with the talent to cultivate, however poorly, was more than one in a hundred, the number of cultivators to mortals couldn't reach such a number, perhaps not even reaching one in a thousand.
