-lrb- seoul hanguk kyongje sinmun 13 feb 94 p 4 -rrb- china 's currency , tax reforms to be 'direct blow ' to rok exports - china 's moves to unify its two currency system -lrb- renminbi and foreign exchange certificates -rrb- , adjust tariffs , raise the vat , and impose a consumption tax will greatly weaken rok export competitiveness in third country markets where rok and chinese goods compete .