Very few commoners could promote to knights by cultivating secret methods; especially senior secret methods. By contrast, super forces like top seven sects in Taixia Country mastered many secret methods and cultivation resources for sure.
In Taixia Country, on one hand, billions of commoners had a great desire and demand for secret methods; on the other hand, few forces and major clans mastered a great number of resources. Therefore, someone would use various means to meet commoners' demand at the risk of their lives.
There were definitely more than 1 disciple among top 7 sects and those super clans who could touch and cultivate those rare secret methods. Only in this way could a sect and a clan maintain a strong vitality and constantly train excellent talents.
Zhang Tie wondered why he had not heard that any disciples of the top 7 sects betrayed their sects and exposed their clans' secret methods to the public, causing a great chaos in the world.