beijing/manila china philippines agree avoid force resolve differences south china sea accord joint statement issue thursday china end visit manila chinese premier li keqiang china philippines long spar south china sea relations improve considerably philippine president rodrigo duterte malaysia taiwan brunei vietnam philippines claim south china sea myriad shoal reef islands china claim waterway aggressively build militarize artificial islands joint statement carry china official xinhua news agency say china philippines reaffirm importance peace south china sea freedom navigation overflight violence threats violence dispute resolve via talk relevant sovereign countries add side believe maritime dispute full sum china-philippines relationship statement say separate statement sum discussions association southeast asian nations summit duterte take note improve relations asean china south china sea view positive momentum look forward announcement start substantive negotiations code conduct coc china say hopefully early 2018 vietnam two side meet early asean china discuss set rule behave dispute water avoid accidents raise tension duterte say two side also successfully test hotline among foreign ministries manage maritime emergencies view practical measure could reduce tensions risk accidents misunderstand miscalculation say china philippines agree avoid force south china sea dispute