What is the story of "Qi Da Fei"?

Qi Da fei is from the "Sixth Year of the Duke of Huan", which is recorded in the book:

"Qi Hou wanted to take Wen Jiang's wife Zheng Dazi suddenly, and the eldest son suddenly resigned. When asked why, the eldest son said, "Every man has a puppet, and qi is big, and he is not a puppet." ”

This means that during the Spring and Autumn Period, the Prince of Qi, the Prince of Qi, prepared to marry his daughter Wen Jiang to Prince Ku of Zheng Guo. But the prince suddenly resigned: "Everyone has their own spouse." The State of Qi is a great power, but it is not my spouse. ”

Many years later, the State of Qi was invaded by foreign enemies in the north, and the State of Qi was in danger, so it asked Zheng Guo for help. After Zheng Guojun suddenly received the request for help from the State of Qi, he sent The Crown Prince to lead troops to help the State of Qi and attack the enemies who invaded the State of Qi together.

After the combined forces of the State of Qi and the State of Zheng defeated the enemy, dukes of Qi, feeling the kindness of Prince Ku of Zheng Guo, repeated the old matter and prepared to marry his daughter Wen Jiang to Prince Ku of Zheng Guo again.

This time, the prince suddenly resigned in the same way.

When others asked him why he resigned, he said: "When I didn't help qi guo, you didn't dare to marry qi hou's daughter, but now after helping qi guo, you have married qi hou's daughter back, isn't this using the life of Zheng Guo's general to exchange your own marriage?" If this is the case, how will the people of Zhengguo look at me? ”

This is the story of Qi Dafei.