The Me in the Mirror at Home Didn't Blink Yesterday

My name is Su Shi. I just graduated and rented an apartment in a first-tier city with a monthly rent of 800. Two bedrooms and one living room, fully furnished, ten minutes away from the subway. I asked the landlord three times. "Really eight hundred?" He said it was really eight hundred. After signing the contract, he took me into the master bedroom and pointed to the old full-length mirror at the end of the bed. "You can do whatever you want with the things in the house." "Just don't move it." I asked: "Why?" The old man was silent for a while. "Especially not smashed." I didn't take it to heart at the time. Eight hundred dollars. Don't say you can't smash the mirror. Even if the mirror sings in the middle of the night, I can sleep with earplugs. It wasn't until after I moved in that I accidentally turned to a video I recorded last night. In the video, I was looking at my phone with my head down. But in the mirror behind me—— The other "I" didn't bow. It is looking directly at the camera through the mirror. I played the video again. Then I discovered something even more wrong. In those ten seconds, I blinked four times. Me in the mirror, Not once. The next night I covered the mirror. Three o'clock in the morning. There were three knocks at the end of the bed. Tuk~tuk~tuk~ The sound didn't come from outside the door. It's from inside the mirror.