The three had dinner, and they were going to say goodbye to each other because there was still a lot to do before school began.

Before leaving, Yang Lanlan said to Hanzi, "Brother Hanzi, you will study alone in L City, but you must take good care of yourself. You have your sister's business card. You often call your sister when you have time. I pay for the phone bill. If you need help from your sister, don't be polite to her, remember?"

Han Zi said, "I remember. My sister seems to have said it for the third time. Don't my younger brother remember it?"

Yang Lanlan said to herself,...