beijing china express strong dissatisfaction india thursday recent crash indian drone chinese territory incident could cause friction along dispute border indian chinese troop confront june august year one stage even resort scuffle throw stone remote plateau near border india ally bhutan china serious prolong standoff decades nuclear-armed asian giants try develop tie recent years still deep distrust dispute border trigger war 1962. china defence ministry say statement indian drone crash recent days give location action india violate china territorial sovereignty express strong dissatisfaction opposition zhang shuili military official china western battle zone command quote say ministry statement china border defence force take professional responsible attitude conduct inspection device zhang say add military would resolutely defend china sovereignty security indian army say unman aerial vehicle train mission indian territory develop technical problems cross so-called line actual control separate countries militaries indian border guard alert chinese counterparts drone soon afterwards indian army spokesman say china provide indian army detail drone come indian authorities investigate colonel aman anand say statement matter deal accordance establish protocols anand say china also lodge diplomatic representations india chinese foreign ministry spokesman geng shuang tell regular brief china ask india immediately stop activities use unman aircraft near border work alongside china maintain border area peace tranquillity say weeks confrontation wind-swept doklam plateau year two side agree expeditious disengagement troop week chinese president xi jinping indian prime minister narendra modi meet effort mend tie summit china september mountainous border remain sensitive side november china criticise visit indian president ram nath kovind remote state arunachal pradesh china claim say china oppose activities indian leaders dispute areas china criticise india crash drone border