Reference answer: The author writes about various sounds in the mountains. On the surface, it looks very lively, but in fact it is very noisy and quiet, showing the tranquility of the mountains. Implicitly denied the secular society and expressed the yearning for nature. For the following article, "those who fly kites in the sky hope their hearts will rest;" Those who are in charge of the affairs of the world, looking at the valley and forgetting the rebellion, have laid the groundwork, emphasized the subtle educational role of nature on people, and expressed the beauty of nature from the side. "