C767 What Kind of Medicine Is in the Gourd

"This sound is around us. I can hear it." Teng Qingshan said to Xue'er, who was beside him.

"Actually, I can hear it too, but I just don't know where this sound came from." Xue'er scratched her head and said to Teng Qingshan, who was beside her.

"Listen carefully. Your ears are better than mine, you should be able to hear where Brother Chen Yu and the rest are