It was Friday night, and the office area of KF Group was already empty, without even a single light.On the entire first floor, only two security guards were left sitting at the front desk.Obviously, the two of them had just taken over the shift and were still energetic, talking and laughing without saying a word.A crisp sound came, it was the sound of the elevator reaching.Immediately, the elevator door separated to both sides, but immediately afterwards, there was a heavy impact, as if something heavy fell to the ground.A security guard said: What's going on?I'll go and take a look.