The origin of this idiom can be traced back to ancient legends in China. According to legend, raccoons are monsters in mountains and rivers. They usually live in deep mountains and forests and like to create epidemics and disasters. In ancient literary works, the word "shadow" often appears to describe the horror and severity of epidemics and disasters.
Besides in ancient legends and literary works, the idiom "shadow" can also be used to describe some social phenomena. For example, in some periods, epidemics and disasters may occur in some areas. At this time, we can use "shadow" to describe these phenomena and express our worries and fears about their seriousness and terror.
In addition to the meaning and usage of Chinese idioms, the word "shadow" is often used in daily life. Some businesses or organizations may use "ghost" as their names or trademarks, such as "ghost supermarket" and "ghost world". These names usually have some special meanings or cultural backgrounds. In addition, some online expressions or slang also use "shadow", such as "shadow possessed" and "shadow attack", which are usually related to the mystery and strangeness of "shadow".
In a word, "ghost" is an idiom in China, which can be used to describe the desolation and profundity of mountains and rivers, as well as the popularity and horror of epidemics. The origin of this idiom can be traced back to ancient legends in China, and it can also be used to describe some social phenomena and express worries and fears about their seriousness and terror.