2 how to test? You can go to the Meteorological Bureau to find a wind measuring instrument and take it to the window to measure the wind. If the wind is above level 3 for a long time, it is also considered a lane rush, because the wind will blow away the anger.
Another situation is that this alley has not seen the sun for a long time, or the sun rarely shines, which is very "cloudy" and makes people feel creepy. In feng shui, it is not good, but evil, because yin is too heavy.