Nail is an ancient phrase in China, which often appears in ancient literature or ancient books. A correct understanding of the meaning of order needs to be combined with the context and background of the text. But the command refers to the meaning of the command, which usually has certain authority. They are instructions from senior leaders or nobles.
This word is widely used in ancient literature, and can be found in historical classics, novels in Qing Dynasty, ancient poems and other literary works. Command is usually a dignified and authoritative language, which means to give the final authoritative instruction. The use of nails in ancient literature is not only a kind of wording, but also a unique language feature in literature.