A professor in Taiwan talked about it a few days ago. But I think it is difficult to connect the previous theory with the current suite. I have briefly read "Yi Jing Qi Men Dun Jia". When there was that theory, there were no suites yet, and no one lived upstairs. Who should live there, and who should live downstairs? I think most of the newly released books are compiled to cater to some people's minds. As long as it is generally comfortable, it will be fine. We all like to live in a house facing south and north, but the TV said that in the past, Huizhou merchants avoided housing facing south because the south is fire. If you are in an east-west alley and you can't make your house face east or west, then that's okay. Find a way to change the courtyard gate to face southwest. Therefore, customs vary from place to place and are not entirely based on the Book of Changes. Everyone knows that the temple gates all face south, but the temple gates in our hometown do not face south. The Forbidden City should be facing south and north, right? However, the Forbidden City does not face due south but extends to Shangdu in Inner Mongolia along its central axis. But this is not the Forbidden City due to the south. When it was rebuilt, it was built according to Feng Shui, Five Elements and other requirements.