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Chapter 692: Cycle_1

The rain had fallen for a whole day and night.

Qian Jiangyue was desperate to know the answer, yet for some reason, he wasn't in a hurry at all.

It was as if he had lost the motivation to pursue the truth.

Maybe, he should just let it be…

This notion crossed his mind from time to time, but he could never let go of the questions that intrigued him.

Even without substantial evidence, Qian Jiangyue firmly believed that he had missed something during those two seconds.

The speaker was delivered to Qian Jiangyue's door the next day.

After setting everything up and plugging it in, Qian Jiangyue closed the doors and drew the curtains.

He had transferred the recorded files onto his computer, and clicked the play button with his mouse.

Compared to the dozens of times he'd played it before, the sound was much clearer this time.

"Is that… a whistling sound?" Qian Jiangyue picked up on a background sound he hadn't noticed before.