In ancient China, there was a man who regarded many words composed of two characters as left and right inscriptions, among which "Jian Dan Qin Xin" was the name. Who is he? What are the rest of the ap

In ancient China, there was a man who regarded many words composed of two characters as left and right inscriptions, among which "Jian Dan Qin Xin" was the name. Who is he? What are the rest of the aphorisms? Sword is like frost, bravery is like iron. Before the third performance of the lute, I had reached my element, Shi Si, and the hidden sword were brave, and the mountains and rivers knew the heart of the piano.

Wu Yinglai's poem "I miss you at the end of the year": "The piano is small and the sword is bold and unrestrained." Later, he used "courage and heart" to describe the combination of rigidity and softness, and Ren Xia was elegant.

Sorry, that's all I know.