Happy with things, not sad for yourself ",the lake in Dongting should be less tearful and less confused!" If Du Fu's call for "a magnificent building" comes from thousands of people of insight in Qian Qian, how can the cold wind blow away people's life ideals and happiness? Du Fu has more than ten million mansions! Looking around the world, there are very few similar people, and it is sad to have a bosom friend. A scholar dies for a bosom friend. The bosom friend is gone, but who knows the sound of the piano? From the sky to the grave, the person who should appear always appears last, or passes us forever. Although bosom friends are hard to meet, once they meet, it is an unforgettable story. Back to Boya, two different hearts can share the same rhythm, just because of a series of vague piano sounds. High mountains and flowing water, how pleasant!