Curvature is the amount by which an object deviates from being flat or straight. In the universe, the nature of spacetime is determined by the distribution of “mass”; when the distribution of mass is uneven, it alters the nature of spacetime, which is known as “spacetime-curvature”. From my perspective, the shambolic notes in Bach's manuscript of Score of Prelude and Fugue in C major are like stars, producing splendid melodies on collision.

Some say “music serves as an asylum for human beings” as the happiness that music brings is irreplaceable. I still remember the days when my daughter was learning to play the piano, and she kept flipping through the worn-out pages. One day I realised, apart from the notes her teacher highlighted, a flower was drawn, together with a smiley face... In this world, in any era, music is indispensable. The creased music scores are like a natural landscape, standing there silently. In this era, no matter how chaotic society is, as long as there are grand mountains, flowing water, and a harmonised melody in our hearts, everything will be fine. - Zhang Yanzi

曲率，表明曲線在某一點的彎曲程度的數值。宇宙中，時空的性質是由物體的「質量」分布決定的，物體「質量」的分布狀況使時空性質變得不均勻，引起了時空的彎曲，被稱作「時空曲率」。 在我看來，巴赫的手稿《平均律鋼琴曲集》(Score of Prelude and Fugue in C major) 上錯綜復雜的音符，好像宇宙中的繁星，碰撞中，奏響美妙的旋律。 有人說，音樂是人類靈魂的避難所。音樂帶給人類的快樂，是其他任何東西都取代不了的。女兒小時候彈鋼琴，她的琴譜一直翻來翻去，舊舊的。有一次我發現琴譜上除了有老師上課時標注的重點，還畫著一朵小花，一個笑臉……這個世界，無論什麼時代，都不能沒有音樂。 揉皺的樂譜，像山水一樣，靜靜地臥在那裡。這個時代，無論怎樣紛亂，只要心中有一座山水，有一段旋律，都是美好！ - 章燕紫