To enter the Medical College, one must of course be literate, and also not too young.
Because once in the Medical College, one can learn Medicine and read medical texts.
If one can't even recognize characters, lacks comprehension ability, how can they read medical texts? If they can't understand the names of medicinal materials, how can they remember each one?
As long as one studies diligently, and passes each school examination, they can graduate in four years.
If one can't pass the school examination, then they must continue to delay.
At that time, the college will issue a certificate from the Medical College, which one takes to the Government Office for stamping, and afterwards, one can practice medicine.
Even though many are eliminated, there are also not a few who pass the assessments.