水银

shǐ shū shang jì zǎi dì gōng li yǒu yǐ shuǐ yín biǎo xiàn de jiāng hé dà hǎi

史书上记载，地宫里有以水银表现的江河大海。

According to historical records, there are rivers and oceans in the form of mercury in the palace.