An Unusual Migration

After returning to Stanford campus, Zhang Lisheng did not go back to the lab but slipped back to his dormitory.

When he opened the door, his roommate heard the door open and woke up in a half-asleep state from the soft bed before asking ambiguously, "Who is that? Lisheng? Is it you?"

"Yes, it's me. I'm sorry for disturbing your sweet dream, Jerry." Zhang Lisheng tiptoed to his bed and lied down without changing his clothes. Not long after, he fell into a deep sleep.

The next morning, the sun peered into the window of the dormitory, making the room warm. The young man opened his eyes and sat up. Right away, he saw Jerry who had just finished rinsing his face and was walking out of the bathroom. He then waved his hand. "Good morning, roommate."

"Hey. Good morning, Lisheng. Long time no see! What time did you come back last night?"

"About twelve o'clock, you even greeted me when I entered. didn't you remember?"