在古文献里，我们常能见到“千金”、“万金”以及“寸金”等词语。比如，成语有“一掷千金”、“千金小姐”、“一字千金”、“一诺千金”等。这些“千金”均不是实指，实指的“千金”应折合成今制重量单位多少克呢？又比如，我们常说：“一寸光阴一寸金，寸金难买寸光阴。”? In ancient literature, we often see “daughter”, “million gold” and “inch gold” and other words. For example, the idioms are “Deal or No Deal,” “Miss Auntie,” “The Deal”, “Promise” and so on. These “daughter’s money” are not real means, actually refers to the “daughter” should be converted into how many grams this weight unit? For another example, we often say: “an inch of time, an inch of gold, hard to buy inch of time.”