A sinkhole was a rock-walled bowl that was steep and could accommodate a large volume. It was deep either like a well or a bucket with extraordinary space and characteristics. It was a wonder of nature.
The biggest sinkhole that had been discovered in the world was over 400 meters in diameter and depth. It was not an exaggeration to call it an underground city.
That was the reason why Ye Chen asked about the sinkholes in Shennongjia during the meal. After all, Zhizhi's home was close to Shennongjia. Meanwhile, her father, Ye Feng, had been to Shennongjia a couple of times, so he must have known about it more than Ye Chen did.
Ye Feng's hand that was holding his chopsticks froze upon hearing his question. He looked at Ye Chen in surprise. "I wonder why are you asking that, little brother."
"Uncle, we're here to investigate sinkholes. That's the reason why Sir Ye asked that," Yu Lei, who was sitting aside, mediated for Ye Chen quickly.
