[Rule 1: After 12 o'clock every night, you cannot look directly at yourself in the mirror for more than 3 seconds]
[Rule 2: If someone knocks on the door, count to 10 before opening the door]
[Rule 3: If someone calls your full name, don't look back]
When programmer Lin Zhou received this mysterious message, he thought it was a prank.
Then there was a knock on his door.
He counted to ten and the knocking disappeared.
He breathed a sigh of relief and looked back at the mirror——
He didn't look back in the mirror.
And the phone screen lights up with the fourth rule:
[Rule 4: You have violated the rules.
