Apart from himself, there were a large number of Guest Elders proficient in the Four Arts of Cultivation on Cultivation Peak, many of whom were Fourth and Fifth Grade, all secretly recruited by Han Li.
The bottle was named Chengdao Vial, the second treasured artifact offered by Han Li, an Emperor Level Top Grade, and it was also an auxiliary Emperor Weapon.
Although the Chengdao Vial didn't possess much offensive or defensive might, its utility was indeed immense. If one mastered it, they could mass-produce most of the pills in the world.
As long as a pill was placed inside the Chengdao Vial, the Creation Formation etched within would automatically activate, absorbing higher-level spiritual energy from the deep void, and then produce a certain number of pills inside.
The number of pills produced by the Chengdao Vial depended on the grade of the pill, the lower the grade, the more produced, and the higher the grade, the less produced.