Explanation: square inch, this refers to the heart of square inch. Do an inch of heart. Disturbed, no opinion, it is called chaos. Du Fu's Poems in Caotang: "The article is eternal, and both gains and losses are known." The third time of "The Legend of the Chivalrous Woman": "Our side is in chaos, so we didn't discuss it properly."
It seems that the square inch comes from the annals of the Three Kingdoms, and the whole sentence was later derived and developed.
Nowadays, there are many meanings between square inches, such as dancing, painting, collecting stamps, collecting banknotes, micro-carving, calligraphy and so on. It can be said that "there is a world between square inches", which means that I am intoxicated or fascinated by this matter and have experienced endless fun from it.