What are the idioms that fall off?

Become morally corrupt

[tuhuàbiàn zhi]

Degeneration: the change of insect desquamation. Metaphor people fall and go bad.

To the new

[tug Zhu xn]

Jude said he wanted to get rid of the old and innovate. Preface to Ren Huang's "Wen Qing Hui": "There is a generation of political and religious trends, and there is a generation of academic thoughts, one after another, bringing forth the new and not returning to the province, while some people talk about history for photographers and literature for those who do."

Use conspiracy to escape

[jīn chán tuké]

A golden cicada sheds its shell. Today, hand in "gold". Escape by trickery.

Enter a higher realm

[China Journal]

Still talking about cicadas and snakes. Preface to Selected Works Xiahou Zhan's Painting Praise Dong Fangshuo: "Cicada takes off Long Bian, abandons vulgarity and becomes immortal." Lu Yanji's note: "Cicadas slough, that is, they shed their shells and come out of the body, and Long Bian, that is, they break the bones and become immortals, and so on."

Enter a higher realm

[Chen Duxiji]

1. Like a cicada shedding its shell, like a snake changing its skin. Metaphor has been liberated and entered a higher realm. "Huainanzi Spiritual Practice": "If this person holds the essence, sheds the snake's solution, swims in Taiqing, walks alone, and suddenly enters the ghost, Feng Di can't marry him, but what is the situation?"