washington u.s. secretary state rex tillerson chinese state councilor yang jiechi tuesday discuss improve maintain mutually beneficial economic relationship unite state china state department say tillerson yang china top diplomat affirm importance regular high-level engagement two countries meet washington discuss north korea nuclear program state department say statement china state news agency xinhua quote yang say china will work washington enhance exchange level top broaden communication coordination regional global issue respect core interest major concern help promote sustain steady healthy development china-u.s. relations benefit people nations also whole world xinhua quote yang say meet late exchange aim reset relations world two large economies follow rocky start election donald trump u.s. president monday yang outrank china foreign minister meet white house trump attack china issue trade south china sea north korea discuss share security interest possible meet chinese president xi jinping accord senior u.s. administration official state department say yang invite tillerson visit beijing tillerson express interest yang visit unite state follow phone call tillerson last week affirm importance constructive u.s.-china relationship yang visit follow months strong rhetoric trump accuse china unfair trade policies criticize island-building strategic south china sea accuse little constrain neighbor north korea december trump incense beijing say unite state stick one china policy washington acknowledge chinese position one china taiwan part late agree phone call xi honor policy interview reuters last week trump urge china rein north korea nuclear missile program china late dismiss trump remark say crux matter dispute washington pyongyang u.s. china discuss 'mutually beneficial economic relationship