Bear invited guests to talk about the problem from many angles and understand the truth of a problem from different angles. Bell, the hero, is a very clever man. He wanted to invite animals to celebrate his birthday, so he wrote a letter and put it in the mailbox to invite his friends.

On Bear's birthday, Bear prepared a table of delicious food. There are cakes, apples, sausages, bread, drinks, bananas and so on, and a candle. It waited for a long time, but the bear's good friend still didn't come. Bear is very anxious and frustrated, and a big question mark appears in his mind. I thought to myself: Why didn't all my good friends come?

So, the next day, the bear went to Uncle Niu's house first and asked, "Uncle Niu, why didn't you come to celebrate my birthday?" Uncle Niu opened the letter and said, "You didn't write down the location clearly. Where can I find you that day? " Bell knew I was wrong. No wonder everyone didn't come. It was my carelessness. I will correct my mistake and will not be careless again.