鐵通

China Mobile Tietong, state-owned telecommunications operator (abbr. for 中移鐵通|中移铁通[Zhong1 yi2 Tie3 tong1])

(Cantonese) iron pipe (weapon)

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)

surname Tie

iron (metal) / arms / weapons / hard / strong / violent / unshakeable / determined / close / tight (slang)