I heard someone knocking at the door at night, but no one went out to see it. What's going on here?

Maybe you heard it wrong or someone else typed it wrong. The person who knocks at the door should leave soon, and when you go to see it, the person has already left.

Matters needing attention when you are alone at night:

1, don't go out at night, most bad guys hang out at night, because people are most likely to affect their vision at night, and they don't feel it at all, even if they are behind you, you are not easy to notice, so the risk index of going out at night is 5 stars.

Don't wash your hair at night, because it's not easy to blow dry your hair at night. If your hair is not dry, you will definitely have a headache the next day. So it's best not to wash your hair at night. Moisture is bad for your health.

Be sure to close the door or lock it before going to bed at night, and never open the door, which is very unsafe.

Most families have doorbell now, so you should pay attention. If someone rings the doorbell for someone he doesn't know, it's best not to open the door, or he just wants to sound out whether there is anyone at home or deliberately harass. In short, he must know himself. Only people can open the door.