I built a seven-story building and wanted to add half a story, so it was eight stories. Is feng shui good?

You'd better not add it. The house has been built for a long time and has its own feng shui. Once broken, it is easy to get into trouble. If you really want to answer it, you'd better consult a Mr. Feng Shui. If you rent this house out to outsiders, there is no need to care so much. By the way, your house is facing that direction. Let me help you see how feng shui is. You have to draw a simple plot for me.