Modern people believe in the harm of flowing in Feng Shui, just as the ancients said. Why? I read dozens of books and looked up a lot of information, but I didn't explain why.
I read a lot of books on water, numerology and physiognomy online, which can be said to be more than a college student's reading. I will talk about my personal thoughts based on the information I have seen:
The ancients used to live in bungalows, and the population density was much smaller than now. From the 1970s to the early 1980s, the winter in the north was quite cold, but since the late 1980s, the weather has really warmed up a lot, which is related to the population growth and the discharge of high-temperature gases. This illustrates a problem, that is, the temperature is rising. Then, if the temperature in the 1970s is compared with that in ancient times, I believe it is much higher, because the population density of the environment where the ancients lived is definitely much smaller than that in modern times. If the temperature is low, the direct flow is definitely harmful. For example, I once tried to have my bed near the window on a summer night. At night, I opened the window 30 cm, and my head was one meter away from the window. Sleeping at night will have nightmares, but once the window is closed, it will be fine. This shows that the wind has caused my sleep problems, but the actual wind is not strong. How big is the wind energy in summer night? But it does have an impact on people. This shows that evil wind is harmful to human body.
If the temperature in ancient times was low, the danger of cross-flow would be greater and more obvious than that in modern times, so the ancients mostly set up a porch at the door in this case to change the wind direction or slow down the wind. In modern times, if you live in a bungalow, I still suggest setting a porch at the door, so I won't go into details.