How to prevent the hotel from opening the door without anti-theft chain?

It doesn't matter if the hotel doesn't have a security chain. You can try this method: general anti-theft is to prevent thieves from entering through the door. So we have to take some defensive measures against the hotel gate, that is, burglar alarm. What we need to prepare is also very simple: a plastic basin and a bottle of mineral water.

First, we want a bottle of mineral water, which is full of water, preferably a whole bottle. Don't drink mineral water. We'll put the cap off the whole bottle of mineral water.

Then, put it on the door handle to hold the mineral water bottle well. Then, we put a plastic basin upside down under the door handle, and our preparations were finished.

The effect of this method is that if a stranger breaks into the house, as long as the door handle is pressed, the mineral water bottle will fall on the basin and give an alarm, which can remind people in the house and deter thieves, thus scaring them away.

Also, if you feel uneasy about the above method, I'll introduce you to another method, which is to use Mense, which is usually placed under the door to fix the housing door, and it is small and light, so you can take it with you when you go out. There are many kinds of door guards, and people can't push the door open outside.