A long time ago, there was a big family. This family had endless rice and grain, and endless beautiful cloth, and lived a very happy life. The surrounding neighbors were very envious, and everyone said that Happy Bird must have lived in this house and never left.

The happy bird really lived in this house. But after too long, the happy bird would feel monotonous and bored. He wanted to go out and see the world, but at the same time he was also very reluctant to be with a beautiful family. So one day, the happy bird said to the old man in this house, "I will leave here soon. What do you want me to leave behind? As long as you bring it up, I will be satisfied."

The old man replied, "Happy Bird, please give me three days, let me discuss with my family, and I will reply to you when I have decided."

So the old man called his wife, son, and grandson, and repeated to them what the happy bird had said, and everyone discussed it. One son said, "With livestock, we can eat meat, and let's ask it for four kinds of livestock." The other son shook his head and objected, "No, land is the most important thing, and we should ask it for land, mills, mills, and gardens. That way we won't have to worry about running out of food." The old man's daughter disagreed and said, "Let the happy bird leave the store to us. Running the store will make our lives rich." The youngest daughter also expressed her opinion: "The most precious things in the world are gold and silver jewelry, let Happy Bird leave these to us, we can become the richest people."

Everyone had their own ideas, and no one was willing to give up their own opinions and fight back and forth. For two days, they didn't decide what to ask Happy Bird for. The old man at home also had no idea. He asked his wife, "My wife, who else hasn't expressed their thoughts?" The wife thought for a while and replied, "Our newly married daughter-in-law hasn't come to discuss it, and I haven't asked her opinion yet." The old man immediately called the new daughter-in-law over. Then he told the daughter-in-law about Happy Bird and everyone's opinions word for word, and then asked the daughter-in-law, "What should Happy Bird leave for our family? What do you think?"

After listening to her father-in-law's words, the new daughter-in-law replied without hesitation, "I think that the Happy Bird should leave unity to our family, and the family and all things will be prosperous. Unity can make us focus on our family, live in harmony, and live a happy life just like now." After listening to the daughter-in-law's words, everyone agreed. The father-in-law said happily, "Now we can find something that the Happy Bird left us."

On the third day, Happy Bird flew to the old man's side and asked, "Three days have passed, have you discussed what you want me to leave behind for you?" The old man smiled and said, "Happy Bird, please leave the unity to my family, and then go." Happy Bird twittered: "What I want to take away when I leave this house is unity. Since you need it, I will keep my promise and leave unity to you, and I will not leave here."

The happy bird stayed like this, and the family was still united and harmonious, and the family lived a rich and happy life forever.