▁certain ▁regions ▁only ▁and ▁conventional ▁overhead ▁w ires ▁elsewhere . ▁ ▁In ▁ 2 0 1 7 , ▁another ▁ground - level ▁power ▁supply ▁technology , ▁Tr am W ave , ▁developed ▁by ▁Italian ▁company ▁An sal do , ▁successfully ▁entered ▁commercial ▁application ▁via ▁the ▁opening ▁of ▁Z hu hai ▁tram ▁Line ▁ 1 ▁first ▁phase ▁in ▁China , ▁and ▁it ▁is ▁said ▁to ▁be ▁the ▁first ▁ 1 0 0 % ▁low - floor ▁tram ▁system ▁adopt ing ▁ground ▁level ▁power ▁supply ▁technology . ▁Later ▁in ▁the ▁year , ▁Western ▁Sub urb ▁Line ▁in ▁Be ij ing ▁will ▁also ▁be ▁opened ▁with ▁the ▁same ▁technology ▁from ▁An sal do . ▁The ▁technology ▁have ▁been ▁lic ensed ▁to ▁CR RC ▁Dal ian ▁and ▁all ▁the ▁techn ologies ▁were ▁transferred ▁to ▁China . ▁ ▁Other ▁cities ▁that ▁have ▁previously , ▁or ▁are ▁in ▁the ▁process ▁of ▁propos ing ▁the ▁use ▁of ▁A PS ▁and ▁similar ▁systems ▁( e . g . A ns al do ▁Tr am W ave ) ▁include : ▁Nice , ▁France ▁( ab andon ed ▁in ▁favour ▁of ▁nick el ▁metal ▁hyd ride ▁batter ies ) ▁T RAM ME T , ▁Barcelona , ▁Spain ▁G estion e ▁Serv izio ▁tram vi ario ▁( GE ST ), ▁Florence , ▁Italy ▁Tr am way ▁de ▁Marse ille , ▁Marse ille , ▁France ▁Environment ally ▁Friend ly ▁Link age ▁System , ▁Hong ▁Kong ▁- ▁proposal ▁by ▁oppon ents ▁of ▁the ▁mon or ail ▁system ▁to ▁use ▁A PS ▁instead . ▁ ▁Similar ▁systems