In Beijing, every inch of land is worth its weight in gold.
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history
寸金 appears in two famous sayings. 寸金难买寸光阴 ('an inch of gold cannot buy an inch of time') pairs with 一寸光阴一寸金, attributed to the Tang-era 《增广贤文》 style proverb tradition. 寸土寸金 describes extreme real-estate value.