What does it mean to put a red symbol on the door?

Sticking red symbols on doors is a traditional folk custom in China, usually to pray for peace and protect health. These red symbols are usually made of paper or cloth, on which are written all kinds of words praying for peace, such as "safe entry and exit" and "safe and auspicious". These red symbols can be pasted on doors, windows, cars and other places, or hung on walls or lintels.

However, these red symbols are not scientific evidence, and they cannot guarantee people's safety and health. So we should keep a rational and objective attitude and don't blindly believe in the role of these red symbols. At the same time, we should also respect the beliefs and habits of others, and don't make unwarranted accusations or attacks on others.