What did Gong Goose mean in ancient times?

Male Goose originated from Yang Xingmi (852-905), the founding emperor of Wu, who conquered Luzhou (now Hefei) and was made King of Wu by Tang Zhaozong. He is an honest official and the people live and work in peace and contentment. People in Hefei, his hometown, made the local Wu Shan specialty "Goose" with delicious spices. Braised goose is tender, smooth and not greasy, and its bones are fragrant. After the king of Wu ate it, he said that the delicacies of delicacies were not as good as the red roast goose in his hometown, so he called it a "tribute", and the red roast goose became famous all over the world.