Jade can't be cut without cutting-people can't be useful without education; Jade needs carving, just as people need training and tempering.

Interpretation: sculpture. Jade must be cut to make a tool. Metaphor means that people can achieve nothing without education and study.

"Book of Rites" source: "Jade is uncut, abrasive, people do not learn, I do not know."

The use case is not taught by a famous teacher, so it is called "~" (the fourth chapter of Cai's Yue Quanzhuan)

Jade and stone are burned together-destroyed indiscriminately

Close friendship and mutual destruction, share weal and woe, and help each other in the same boat.

Antisense is clear, black and white is clear, and right and wrong are clear.

Interpretation: all, all; Burning: burning. Meiyu burns like a stone. Metaphor is good or bad, mutually assured destruction.

Source "Shang": "When the gang is on fire, everything will burn."

There are no elite soldiers in the use case and no reinforcements outside. If it is broken, ~. (Chen's "Water Margin" twelfth time)