C318 The secret in the hole

Hei Zi went into the hole and did not move.

My heart skipped a beat, and I thought to myself, Don't tell me there's something inside the cave, that Hei Zi met with danger?

But that cave is so high up, even if we climb up, it won't be for long. Even if we want to save him, it will be too late.

"Hei Zi!" Captain Liu anxiously shouted out his name once again.

And this time