A week later, an old man pushed the door of Huaxin Bookstore in Beijing open.
When the shop assistants saw the old man, they smiled and greeted him, "Professor Min, you're here to buy magazines again."
Min Hai nodded and casually flipped through the magazine rack.
Although Min Hai was old now, he still maintained the habit of reading physics and mathematics magazines.
"Has the International Mathematics Journal arrived?" Min Hai asked.
"Yes, on the shelf over there. The cover character of this issue seems to be Chinese. Take a look." The shop assistant took the magazines from a higher shelf and handed them to Min Hai.
Min Hai was suddenly stunned.
"Professor Min?" The shop assistant gently nudged the professor.
"Is this this month's International Mathematics Journal?" Min Hai frowned and asked.
"Yeah." The shop assistant was a little confused. She did not know what was wrong with Min Hai.