▁with ▁six ▁mot ored ▁( M ) ▁cars ▁and ▁four ▁tra iler ▁( T ) ▁cars . ▁▁ ▁" xx " ▁corresponds ▁to ▁the ▁set ▁number . ▁ ▁C ars ▁ 3 , ▁ 7 , ▁and ▁ 9 ▁are ▁each ▁fitted ▁with ▁two ▁single - arm ▁p ant ograph s . ▁ ▁Inter ior ▁▁ 1 st / 2 nd ▁batch ▁sets ▁Pass enger ▁accommod ation ▁consists ▁of ▁longitud inal ▁ben ch ▁se ating ▁with ▁individually ▁sculpt ed ▁seats ▁covered ▁with ▁green ▁mo qu ette . ▁Pass enger ▁information ▁is ▁provided ▁by ▁LED ▁scrolling ▁displays ▁above ▁the ▁door ways . ▁▁ 3 rd - batch ▁sets ▁▁ 4 th - batch ▁sets ▁Three ▁fourth - batch ▁sets ▁have ▁two ▁L CD ▁passenger ▁information ▁screens ▁above ▁each ▁door way . ▁ ▁History ▁Tw elve ▁eight - car ▁ 1 0 - 3 0 0 ▁series ▁sets ▁( 9 6 ▁vehicles ) ▁were ▁built ▁between ▁ 2 0 0 4 ▁and ▁ 2 0 0 6 ▁to ▁replace ▁the ▁older ▁( 1 st ▁and ▁ 2 nd ▁batch ) ▁ 1 0 - 0 0 0 ▁series ▁sets ▁d ating ▁from ▁the ▁late ▁ 1 9 7 0 s . ▁These ▁were ▁designed ▁to ▁be ▁length ened ▁to ▁ten - car ▁sets ▁in ▁the ▁future ▁with ▁the ▁insert ion ▁of ▁additional ▁mot ored ▁and ▁tra iler ▁cars ▁as ▁cars ▁ 3 ▁and ▁ 4 . ▁The ▁majority ▁of ▁the ▁sets ▁were ▁built ▁by ▁Tok y u ▁Car ▁Corporation ▁( now ▁J - T RE