From the famous poem 《楓橋夜泊》by 唐代詩人張繼:
瞎子摸象. The story of the blind men and an elephant.
From Wikipedia: a group of blind men (or men in the dark) touch an elephant to learn what it is like. Each one touches a different part, but only one part, such as the side or the tusk. They then compare notes on what they felt, and learn they are in complete disagreement… (read more)
曹沖稱象. This illustrates the story of Cao Chong’s method of weighing an elephant from the story “Records of Three Kingdoms”.
From Wikipedia: “Cao Chong (196 – 208) was a son of the powerful 3rd century Chinese Chancellor Cao Cao. He was renowned as a child prodigy, having the intelligence of an adult at the age of five. He is best known for his ingenious method of weighing an elephant using the law of buoyancy.”