Interpretation of the number of images "Zuo Zhuan Xi Gong fifteen years": "Turtle, elephant also; Oh, count. Things are born with elephants, and elephants are born with nourishment, and they are counted. " Du Pre-note: "Turtles speak like elephants, count by numbers, live like elephants, and then possess them, so they know whether they are good or bad." In the Book of Changes, the words "Sun" and "Mountain" are all images, and there are also the first nine words and the first six words. Elephant number is also called tortoise shell. The Three Kingdoms Wei's Interpretation of Difficult Houses without Good or Bad Luck: "Therefore, I can occupy the occupants for no reason, so there is no reason to be confused." "Old Tang Book Official Records III": "The law of the servant's life. Cheng is the second. Four methods: one turtle, 2.5 trillion, three changes and four types. Everyone knows its image number and exchanges information about it, so it is good or bad. " Huang Qing Zongxi's Chronicle of A Shou, the Dead Son: "The books on Lu, Xiang Shu, Zhou Chuan, Li Chuan, Gou Gu, Fang and Geography are quite unknown to our predecessors." Wang Kaiyun's Preface to Zhuangzi: "His Confucian title is slow and heavy, and he is obsessed with the lack of things, and the number of things and images is what he wants, which is unique in Zhuangzi." Like mammals, elephants are the largest animals on earth. It is common in tropical areas such as India and Africa, and its front teeth are extremely long, which can be used for carving into vessels or works of art: ivory. Ivory tower (a small world of writers and artists divorced from the masses and life) shape, appearance: image. Scene. Meteorological phenomena. Explanatory number (number) representing, dividing or calculating a quantity: number. Quantity. Numbers. Number theory (a branch of mathematics that mainly studies the properties of positive integers and the laws related to them). Numerical control. A few, a few: several people. A few days. Skills, academic: "The number of games played today is decimal." Fate, heaven