Children drown in the water. They choke their mouths and throats. If they don't fall to the bottom of the water, there should be no sediment in their mouths.

four uncles said that there was mud in the mouths of the two drowned children, which made me very puzzled. Why is this? Is there anything that dragged the two children to the bottom of the water and drowned?

the idea just flashed through my heart, but I didn't say it. I thought for a while and asked, "fourth uncle, have you found any other special places?"

"other places..." four uncles frowned slightly and hesitated. He seemed to have something to...