Yi Yunrui pondered for a moment, "When was this mask developed?"

I believe that when Big Brother got this mask, he already had a general understanding of the mask.

"Not long ago, but you don't need to worry, this mask is not easy to circulate." Saying that, Yi Yuntian took the lighter out and struck fire at the mask, the fire just sputtered out and the mask caught fire all of a sudden!

In just three seconds, the mask had been burned to the ground, with nothing ...