C481 The Mysterious Old Man

"This matter seems to be very strange. Why did such a thing happen?"

Su Chen scratched his head.

Since the system had already notified him, it meant that there were indeed some secrets behind this matter.

However, Su Chen did not feel that there was any danger.

At this moment, Su Chen heard a melodious sound. It was the sound of a zither.

This sound was very pleasant to listen to