chapter 180 The best jade

S-level mission? In the previous S-level mission, they encountered a demon of earthly immortal level. What about this time?

Daven Walker was also a little nervous. He asked, "What does it say?"

Wu Qingying: "An underground building suspected to be an ancient relic was discovered in East Siberia. Six expedition teams from various countries have entered it, but none of them have come out."

Daven Walker: "The mission was issued by the state?"

Wu Qingying shook...