"Autumn Thoughts in the Blue Sky" by Cai Yong in the Eastern Han Dynasty. This piece was first seen in "Guyin Zhengzong", and later included in "Qin Scores Through the Ages", "Chun Caotang Piano Scores", "Lantian Pavilion Piano Scores", "Qinxiangtang Piano Scores", "Ziyuantang Piano Scores", "Qinxiangtang Piano Scores", Liluxuan Music Score, Piano Score Harmony, Erxiang Score, Wuxue Mountain Room Score, Jiao An Score, Tianwen Pavilion Score, Qin Xue Chujin, etc. Collection of piano scores.

The "Blue Sky and Autumn Thoughts" of the album "Liuyunyue" was composed by Mr. Mani Tianhong according to "Jiao'an Piano Score", which was later included in "Xingxin Piano Score".

The explanation for the title of "Bi Tian Qiu Si" in "Xing Xin Qin Pu" says: "It was written by Cai Yong in the Eastern Han Dynasty. This song is high in the sky and the Han Dynasty. It means high and far. The thoughts of thousands of miles. The cadence is rhythmic. The strange and different. The west wind is cold. The scenery is depressing.

In "Xing Xin Qin Pu", after the "Bi Tian Qiu Si", it is written: "This song was called Bei Qiu Si in the Qing Dynasty. The so-called Bei Qiu Si. It is not the north but the meaning of the south is lost. It is different from Dongting. The reason of Qiusi. It has nothing to do with the sound. The monk Mingchen of Jianlong Temple in Yangzhou in the Qing Dynasty was good at this song. When it comes to the qin, he thinks that the sound of music is enough to express the quietness and restraint. Release the dryness. Distant temperament. The air is clear. The chest is clear and calm. The detachment is like going out of the human realm. The person who stands in the atmosphere of Egypt. Only the qin. He is good at qin theory. In the hot summer. Qin Weihan wrote the piano score of Jiao'an. This piece is included in it. Tianhong's blue sky and autumn thoughts. That is, the piano score of Jiao'an is published. Only the fourth paragraph is partially adapted. Therefore, there are differences."

"Blue Sky Autumn Thoughts" was also composed by Cai Yong. He composed many qin pieces in his life, most of them were famous pieces handed down from generation to generation, and this piece is also a masterpiece. However, since it has been passed down from the Han Dynasty to the present, no contemporary qin players, except Mr. Mani, are known to have played this piece. For the excavation and inheritance of ancient songs, it is very meaningful and necessary to organize the score, play and record ancient songs. This song is written in the endless blue sky, wandering beyond the four seas. He has a broad mind and a long-term vision. It means lofty and far-reaching, the heart accepts the sea and the sky, and the song of words and aspirations. And Mr. Mani's interpretation is clear and lofty, leaving a deep impression.