It means that there are oranges in Huainan that are big and sweet. As soon as it was transplanted to Huaibei, it became an orange. Original: Oranges born in Huainan are oranges, and those born in Huaibei are oranges. Leaves are similar to disciples, but they taste different. So, if it is, the water and soil are different.
The whole story is: Yan Zi of the State of Qi went to Chu, and the king of Chu wanted to tease him and deliberately took a prisoner away from the hall. The king of Chu asked: What crime did this man commit? Answer: A man in the State of Qi stole. The King of Chu said to him, "Do you all like stealing? Yan Zi replied: There are oranges in Huainan, which are big and sweet. As soon as it was transplanted to Huaibei, it became bitter orange, sour and small. Why?
Yan Ying:
Yan Ying, surnamed Ji and Yan, with the middle word "Ping" and the historical name "Ping", was born in Yiwei (now gaomi city, Shandong Province), and was a famous politician, thinker and diplomat of Qi in the Spring and Autumn Period.
Yan Ying is the son of Wei Yan, a doctor of Qi State. In the 26th year of Qi (556 BC), he died of illness, and Yan Ying succeeded to the throne as a doctor. He has served as Qi, Zhuang Gong and other officials, assisting the court for more than 50 years. He is famous for his political foresight, diplomatic ability and simple style. He is clever, witty and eloquent. He assisted in state affairs and repeatedly remonstrated with the monarch of Qi State. He is flexible and principled, and he is not humiliated when he goes abroad, thus safeguarding the national dignity and prestige of Qi.
In the forty-eighth year of Qi Jinggong (500 years ago), Yan Ying died. His thoughts and anecdotes can be found in The Spring and Autumn Annals of Yan Zi.