The grave paper that had been pressed for three years was lost by the child. What should I do?

First of all, I don't think the child understands why it is so naughty. He took it and lost it without thinking too much. He didn't mean it. If he knew the reason, or knew more, he wouldn't take it casually. But adults should attach great importance to this aspect, so first, don't take it to heart. Second, be sure to tell children not to do it in the future and talk about the reasons. Third, you can only buy another one, and then mutter to yourself in front of the grave to comfort the deceased.