Overlapping cases are similar to modern acrobatics that perform handstands and other activities on tables, stools and other things. The performance form of overlapping cases is that geisha performed before one case and gradually overlapped, reaching as many as twelve cases. On the portrait brick unearthed in Pengxian County, Sichuan Province, a female geisha with a double bun performed handstand on twelve stacks of cases, holding the case in both hands, bending over, extending her feet backwards and facing upward, as if eager to see her heels. On a portrait brick unearthed in Deyang County, Sichuan Province, a geisha performed handstand on six cases, and a person next to him held the case, pretending to be frightened, giving people a thrilling feeling.

See/read/China Sight /3663 1.html.

2、

Example: "The furniture of the Qin and Han Dynasties was developed on the basis of the furniture of the Spring and Autumn Period and the Warring States Period. During this period, bronzes were gradually replaced by wooden objects. During the Qin and Han Dynasties, people's life activities were mainly indoors, and sitting on the floor tended to live on the bed, which led to the prevalence of furniture supporting the bed. The main furniture in this period is furniture, tables, desks, beds, couches, screens, walkways, wall cabinets, cupboards, bamboo poles and so on. On the basis of the case of the Warring States, the case of the Han Dynasty gradually widened, and it was still a container for placing things, with various forms, including schemes, round cases and overlapping cases. In the Han dynasty, people's daily life was centered on beds. Generally, there is a screen behind the bed, and there is a bill on the bed. Put a few boxes before or on the bed ... "

There is a word "overlapping cases" in the above sentence, which is obviously the name of an ancient furniture.

3, but many dictionaries can't find this word, because it doesn't need to be included in the dictionary like the above two proper nouns, just like sweaters and pants. Although it is widely used, it is not necessary to include it.

As for later, people gradually used it in other senses, because of the needs in the field of literature and art:

For example, Yujuan Wen's TV series "Tiaonan Stack Case" and Xu Shaowu's novella "Shacheng Stack Case" can only be understood after reading the works, otherwise it is difficult to speculate literally. ...