beijing continue stable development china-u.s. economic tie major contributor global growth chinese president xi jinping say meet unite state president donald trump beijing china unite state face economic issue forward-looking constructive way resolve problems expand economic cooperation xi say accord statement issue china ministry foreign affairs thursday china agree low market entry barriers bank insurance securities industries gradually reduce vehicle tariff statement say u.s. company announce slew deal thursday could worth much 250 billion trump visit beijing china 's xi stable development china-u.s. economic tie drive global growth