beijing china hop unite state help cause problems dispute south china sea senior chinese diplomat say friday ahead next week visit beijing president donald trump unite state criticize china construction islands build-up military facilities sea concern could use restrict free nautical movement u.s. navy ship also carry freedom navigation patrol area anger china speak reporters trump trip chinese vice foreign minister zheng zeguang say china indisputable sovereignty islands surround water south china sea essence south china sea problem regional countries illegal occupation china islands reef zheng say add china will resolve issue peacefully talk countries directly involve south china sea issue issue china unite state add hope external party unite state plant flower few thorns help cause problems zheng say say hop unite state could objectively view positive developments south china sea respect efforts china southeast asian countries safeguard peace stability issue freedom navigation south china sea china oppose party use excuse harm china sovereignty security interest add trump administration vow conduct robust south china sea operations china claim area trillion ship-borne trade pass year contest brunei malaysia philippines taiwan vietnam speak early day another senior chinese diplomat say china vietnam agree manage dispute south china sea friendly talk follow ugly spat summer two communist neighbor countries long loggerheads issue vietnam emerge vocal opponent china claim majority regional sea schedule meet foreign minister august cancel sideline regional gather manila amid argument militarization south china sea island-building hanoi beijing however seek get relations back track top chinese leader tell vietnamese host september two communist party share destiny speak chinese president xi jinping go vietnam next week state visit attend summit asia pacific leaders chinese assistant foreign minister chen xiaodong say leaders two countries many deep frank discussions maritime issue reach important consensus chen tell news brief side uphold principle friendly consultations dialogue jointly manage control maritime dispute protect big picture develop sino-vietnam relations stability south china sea china say hop u.s. 'help cause problems south china sea