Because an epidemic or a war from the Xu family could break out at any moment, even if you are not in the military, you could still be affected. By that time, if you didn't have enough medicinal materials to treat your own injuries, no matter how much money you had, you would ultimately lose your life.
The importance of medicinal materials had become unquestionable, which is why the status of Medicine King Valley had become increasingly important. Therefore, even during such tense military times, the rulers still allowed a constant stream of troops to enter Medicine King Valley for ongoing development. During this period, records indicated that the operations within Medicine King Valley continued as normal because it wasn't entirely under the control of the rulers' class, who continued to closely monitor every movement within the Valley. Everyone working there knew this, and even in the absence of the rulers, they dared not slacken in the slightest.
