Feng Wang, from The Book of Songs, has always been regarded as a masterpiece of mourning for the motherland. It is said that one summer more than 2,000 years ago, Dr. Zhou traveled through the beautiful scenery and saw the ruins of the old ancestral temple buried by weeds. He felt that Zhou Shi had been subverted and left sadly. It describes a person's sad mood when he sees his ideal building collapse and be buried in Miao grass. This poem has been sung continuously for two thousand years. So that people call the sadness of loss from the heart' the sadness of separation'.