According to the biography of Ji Kang in the Book of Jin, Ji Kang was good at playing Guangling San and didn't teach it to others. He was victimized by Si Mazhao. When he died, he asked for a piano and played it again. He said, "The three wonders of Guangling are lost now."

Later, it was a metaphor for losing knowledge and skills.

The body of wood and the heart of stone-unshakable

According to the biography of Xia Tong in the Book of Jin, Jia Chong saw it by the waterinfo and wanted to impress it with his wealth, so he sent ceremonial guards, bands and singers to sail around the boat three times in the summer, leaving him in the same boat. Chong and others said, "These five children are Woodenhead with a heart of stone." .

Metaphor is not tempted, not tempted.