通问

通问	tōng wèn	to mutually send greetings / to communicate / to exchange news
通	tōng	to go through / to know well / (suffix) expert / to connect / to communicate / open / to clear / classifier for letters, telegrams, phone calls etc
通	tòng	classifier for an activity, taken in its entirety (tirade of abuse, stint of music playing, bout of drinking etc)
问	wèn	to ask; to inquire