互不相欠

see 兩不相欠|两不相欠[liang3 bu4 xiang1 qian4]

mutual

no; not so / (bound form) not; un-

each other / one another / mutually / fret on the neck of a pipa 琵琶[pi2 pa5] (a fret on the soundboard is called a 品[pin3])

appearance / portrait / picture / government minister / (physics) phase / (literary) to appraise (esp. by scrutinizing physical features) / to read sb's fortune (by physiognomy, palmistry etc)

to owe / to lack / (literary) to be deficient in / (bound form) yawn / to raise slightly (a part of one's body)