通渭

通渭	Tōng wèi	Tongwei county in Dingxi 定西, Gansu
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)
渭	Wèi	the Wei River in Shaanxi through the Guanzhong Plain 关中平原