What should I do if there is paranormal phenomenon in girls' dormitory?

Scientifically speaking, there are many possibilities.

One is a prank between classmates, the other is that people in your dormitory are timid, and some troubles lead to suspicion and timidity between you.

The concept of superstition.

Everything in Feng Shui can be regarded as evil, so there are many ways to solve it. Folk methods, such as putting metal utensils, such as scissors, under the pillow (mostly ghost pressure), or finding six copper coins (five emperors, no one can try a dime) to hang in the house, are slightly abnormal. You can go to a regular large Taoist temple and ask for a sign or something (not recommended, not very formal))

In addition, if there is really a feeling of ghosts pressing down, spitting is not the way.

Finally, if you are superstitious about this thing, you'd better stay as far away from it as possible. If the above methods can't be solved, or the situation is serious, other measures can be taken. Finally, a word of advice to the girl, don't reveal your birthday at will. Although Buddhism is not necessarily spiritual, there are actually many people in the world who believe in evil dharma and practice it. Not to mention places like schools, because of historical reasons, most of the construction time can be regarded as a repressive facility in Feng Shui.