Idiom. It means lamenting that the country is broken and today is not as good as before. It also refers to the pain of national destruction and death. 　

The Book of Songs "Feng Wang" has always been regarded as a masterpiece of mourning for the old country. It is said that one summer more than two thousand years ago, Dr. Chow passed by Haojing on a trip and saw the ruins of the old ancestral temple buried in weeds, feeling that Zhou Shi was subverted and sad and left.