Minghuai felt something was wrong. At first, she found a person standing downstairs where she lived in the middle of the night.
Later, someone knocked on the door on a rainy night and said he wanted to come in to take shelter from the rain.
One night she woke up suddenly and heard the sound of a key flicking.
There was a soft "click" sound.
The bedroom door seemed to have been blown open a crack by the wind, and she always felt that there was a pair of eyes behind the door looking at her.
She also met Curly, who had a black cat, and no, that wasn't a cat either.
Purpose: Science