C907 A Substantial Pill Fire

"Mr. Fei, how is it? I told you not to worry!"

The air wall slowly rose. Not only did it separate the participants from the outside world, but it also separated them from each other, ensuring that every participant was in a completely quiet environment.

"Not a bad design. This way, we won't be able to affect these seniors refining pills!"

Loong Fei nodded slightly