Jing heard Lin Ya's instructions, nodded, and quickly took out a short green flute.
After taking it out, she glanced at it again and blew it without hesitation.
However, Hu Xiaobei frowned because he couldn't hear any sound.
"This flute is a bit strange!"
While speaking, Hu Xiaobei carefully observed it, noticing that it looked shorter than ordinary flutes.
While observing, Hu Xiaobei heard a soft explanation by his ear, "Xiaobei, this flute was also left by the elders before. It doesn't make any sound, but it can make the ancient boat on the island, which can pass through the array, sense it. So usually, each of us carries it. This way, when we come back and blow it, it can let the people in the array know."
"That's how it is! This invention is really clever!"
Admiring it, Hu Xiaobei turned his head again to look at the lake surface and saw ripples appearing on the surface.
