What does muscle tremor mean?

The so-called muscle trembling refers to the "muscle beating" in the idiom "jumpy", which often describes being worried about disaster or encountering very terrible things, and being very scared and uneasy.

People also use tremors to predict good or bad luck. In the ninth episode of Romance of the Three Kingdoms, when Dong Zhuo's mother talked with Dong Zhuo, she said, "I'm afraid it's not a good sign." The ancient book Jade Sagger summarizes various folk divination methods, and the method of good or bad luck is one of them.

Jade Sagger is a masterpiece of all kinds of divination, also known as Jade Sagger General Book. Generally, they were written in the names of sages such as Gui Guzi, Li, Zhou Gong and Yuan Tiangang. Xu Xun (a true gentleman from Jin Dynasty) had a brainwave and was named "Jade Sagger" in history.