C649 Secret Cave

"How amazing, could this be the legendary heavenly music? There's clearly nothing here, yet such a sound can be heard." Liu Fengyun exclaimed.

"Is this sound coming from somewhere else? I heard that when it was snowing, the ground was covered with snow, which then formed a kind of natural transmission medium that could transmit the sound waves." Lee Ke said.

Liu Fengyun understood all of this