互通有無

mutual exchange of assistance (idiom) / to benefit from each other's strengths and make up each other's shortfalls / to reciprocate with material assistance / scratch each other's back

(idiom) mutual exchange of assistance; to benefit from each other's strengths and make up each other's shortfalls; to reciprocate with material assistance; to scratch each other's back

mutual

to intercommunicate / to interoperate

to go through / to know well / (suffix) expert / to connect / to communicate / open / to clear / classifier for letters, telegrams, phone calls etc

classifier for an activity, taken in its entirety (tirade of abuse, stint of music playing, bout of drinking etc)

to have; there is / (bound form) having; with; -ful; -ed; -al (as in 有意[you3 yi4] intentional)

to have or have not / surplus and shortfall / tangible and intangible / corporeal and incorporeal

not to have / no / none / not / to lack / un- / -less