After about half an hour, the light gathered on the surrounding metal pillars began to gradually fade, and the zzz sound that had disappeared earlier echoed again. This time, it wasn't something rising from the ground, but rather those metal pillars slowly descending. Seeing this scene, Yi Tian and the others did not show any change in expression and still stood beside Situ Hao, guarding him, without any rush to take action.
When all the metal pillars sank down, Yi Tian and the others finally breathed a sigh of relief, but just as they relaxed, a zzz sound came again. This sudden noise startled them, but then they saw a large pit suddenly appear on the ground with a straight staircase emerging from the opening.
Undoubtedly, this suddenly appeared pit was the entrance to the underground research facility. After the entrance revealed itself, Yi Tian and the others let out a low exclamation before turning their heads to look at Situ Hao.
