Who knows these four words?

The fonts you see are very common on the lintels of ancient houses all over the country, and most of them form an uncommon word, which is difficult for ordinary people to understand. Only local people know it, and some people have clouds. In this case, besides the auspicious meaning, there are other Taoist practices to ward off evil spirits or avoid disasters, or they are credible. The influence of folk feudal superstition culture is deeply rooted, and various factors are mixed among them, which does not rule out the possibility of similar speculation.

The four words are "blue sky", "boundless", "landscape soil" and "many years". After careful analysis, it is not difficult to find that each combination has its own meaning, that is, the blue sky refers to the sky, it is boundless, the mountains and rivers are picturesque, and the years are long. Together, it is "everlasting", and it disappears after a little bit of fog.