Look at this little story. It probably means harmony between husband and wife.
In the Spring and Autumn Period, Duke Mu of Qin had a little daughter who was born with a love for jade, so Duke Mu of Qin named her "Nong Yu". Nongyu was free-spirited by nature and liked to play the flute and the sheng. Duke Mu loved her so much that he ordered craftsmen to carve jade shengs from the Western Regions as tributes and gave them to her. Since the princess had the jade sheng, her skill in playing the sheng has become even more exquisite. When she was a teenager, she was extremely beautiful and intelligent. Duke Mu of Qin wanted to recruit a prince from a neighboring country as his son-in-law, but he refused to do so. He had his own ideas. If he didn't understand music and was not a master of musical instruments, he would rather not marry. Duke Mu cherished his daughter and had no choice but to obey the princess.
One night, the princess was leaning on the railing to admire the moon, using the jade sheng to express her yearning for love and release the spring mood in her heart. At this time, the sound of the cave flute and the music of the princess's sheng sounded. For several nights in a row, the music of Sheng was like the sound of dragons and the whistles were like the crowing of phoenixes. The ensemble was as beautiful as fairy music and could be heard throughout the Qin Palace, even within a radius of hundreds of miles. Duke Mu asked the reason, and the princess said that she wanted to make peace from a far away place. Duke Mu of Qin ordered General Meng Ming to find the person who played Xiao. We went all the way to the foot of Huashan Mountain and heard from the woodcutter that there was a young man named "Xiao Shi" who lived in seclusion on Mingxing Cliff at the middle peak of Huashan Mountain. He was good at playing the flute and his music could be transmitted for hundreds of miles. Meng Mingli came to Mingxing Cliff and brought Xiao Shi back to the Qin Palace. It was the Mid-Autumn Festival, and Duke Mu of Qin was very happy to see that his flute was also made of jade, so he invited the princess. The two fell in love at first sight, and they started to play together. The song was never finished, and the golden dragons and colorful winds seemed to be dancing in the palace. When they got up, everyone was fascinated by what they heard, and they all praised: "Xianle!" After Nongyu and Xiaoshi got married, they lived in the palace. Xiao Shi taught Nong Yu how to use the flute to learn the sound of the phoenix, and Nong Yu taught Xiao Shi how to use the sheng to learn the sound of the dragon. After more than ten years of learning, he really brought the phoenix down from the sky and stopped on their roof. Soon the dragon also came to them. in the courtyard.
One day, Xiao Shi said: I miss the quiet life in Huashan. Nongyu said: I would like to go with you to enjoy the purity of the mountains and fields. The two of them played together. For a moment, dragons and phoenixes danced, and auspicious clouds rolled. Nongyu rode on the colorful phoenix, and Xiao Shi stepped on the golden dragon. For a moment, the dragon and phoenix flew into the sky, and the dragon and phoenix appeared auspicious. And go!
Later, in order to commemorate the touching story of Nong Yu and Xiao Shi, people used the phrase "dragon and phoenix present auspiciousness" to describe the faithful love between husband and wife who fly together, love each other, help each other, and enjoy each other for hundreds of years.
The above information comes from Baidu Encyclopedia.