1, this "buy oranges" stem comes from Zhu Ziqing's famous reminiscence prose "Back". "Back" describes the scene that the author left Nanjing for Peking University and his father went to pukou railway station to see him off and buy him oranges.

2. There are the following classic dialogues.

I said, "Dad, you go."

He looked out of the car and said, "I'll buy some oranges." You stay here and don't walk around. "

So, if someone tells you not to move, he goes to buy some oranges, which means that he is your father and is using you.