What does the Sizhu case refer to?

Silk and bamboo: ancient musical instruments, stringed instruments, thin neck and round shoulders, hollowed out, thirteen strings. Case: refers to official documents, books and other documents of the government.

1, Sizhu: Sizhu musical instrument is a group of national musical instruments. Compared with percussion instruments, it has strong melody and softer and brighter timbre. Most of the music on silk and bamboo is delicate, gentle, beautiful and elegant, and is good at expressing happy feelings. Silk and bamboo music includes Jiangnan silk and bamboo, Guangdong music and Fujian Nanyin.

2. File: The file of the file is a crossbar frame file, that is, a wooden shelf cabinet; "Case" is a small desk, and the relevant documents dealing with an event are called "case" at the back. Shang dynasty was called "book", Zhou dynasty was called "clock", Qin and Han dynasties were called "ancient books", after Han and Wei dynasties, they were called "documents", "manuscripts", "case files" and "book books", and after Qing dynasty, they were mostly called "files".