What is the sign that a stranger puts a glass of white water at the gate?

Putting a glass of white water at the door is usually a folk custom, and there is no specific scientific basis or explanation. Different regions and cultural backgrounds may have different interpretations. Here are some possible explanations:

1. Some people think that putting a glass of white water at the door can ward off evil spirits and prevent bad things from happening. This practice is usually considered to protect the safety of families and residents.

Some people think that putting a glass of white water at the door can bring good luck and wealth. This practice is generally considered to bring good luck and wealth.

Some people think that putting a glass of white water at the door can mark your position and prevent thieves or other undesirable elements from entering. This practice is usually considered to protect the safety of families and residents.

Whatever the explanation, this practice is based on a cultural tradition or belief, and there is no scientific basis to prove its effectiveness or significance. If you are curious or worried, you can ask local residents or cultural experts for more information and details. At the same time, whether you put a glass of white water at the door or not, it is very important to be vigilant and aware of safety.