心中有数xīnzhōngyǒushùTop 35000Meanings1. to know what's going onCharacters used心heart中middle有to have数countExamples1男人nánrén老lǎo不bù老lǎo,自己zìjǐ心中有数xīnzhōngyǒushù;女人nǚrén老lǎo不bù老lǎo,别人biéren一目了然yīmùliǎorán.A man is as old as he feels and a woman as old as she looks.