亲密无间 (qīn mì wú jiàn) | Meaning: (idiom) to have a very close relationship with each other | Chinese Idiom with Pinyin & Origin

as close as one's hands and feet (idiom); loving one another as brothers · deep friendship · closely attached to one another情同手足qíng tóng shǒu zú

inseparable (as form and shadow)形影不离xíng yǐng bù lí

intimate · close亲密qīn mì

(lit.) as the shadow follows the body (idiom) · (fig.) closely associated with each other; inseparable; to follow relentlessly如影随形rú yǐng suí xíng

brotherly affection手足之情shǒu zú zhī qíng

stuck together as by glue (of lovers) · joined at the hip如胶似漆rú jiāo sì qī

(idiom) to have a very close relationship with each other