This was written by Yu, who wrote it after he came back from Europe. 1. should refer to the remains of ancient civilizations in Greece and Rome. 2. The ruins that have suffered great humiliation have been parked there casually and leisurely, like stone carvings, stagnant and solidified, which always symbolizes the history related to it, so the author says that history is solidified here. 3. The meaning of The Call of Ruins is to call on people to continue to struggle for the transformation of history. Young people think that they can't find a suitable method and environment. The author said, "So what? Isn't that what the content is? " In other words, it is everyone's responsibility to explore methods and transform the environment.