聯通

China United Telecommunications Corporation / aka China Unicom or Unicom / abbr. for 中國聯通|中国联通

connection / link / to link together

to ally / to unite / to join / (poetry) antithetical couplet

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)