Where are the cloud arches and clouds in the traditional buildings in China? It is best to explain the picture. thank you

There is no cloud arch on the roof, and the cloud bucket and cloud arch are located under the purlin on the roof. Some ancient buildings will have cloud buckets and cloud arches above the hanging pillars on the roof. The above picture shows an ancient building that I repaired, and it happens to have a cloud arch, which is located under the hanging stigma and purlin on the roof. Our place is also called "Sparrow Back", which is called "Yuntuo" and "Yunhua" in different places. Of course, there are many cloud arches on the railing.