C412 Find clues

I looked at the lid and wondered if the black cat was hinting at me to come here to tell me that Zhao Bing and her parents were trapped under the lid.

I lowered my head and prepared to throw my slippers into the water. After opening the lid, I looked inside, but was stopped by Cang Ling, who said to me:

"Master, you can't go down. If you open the lid at this time