, ▁North ▁Korea . ▁The ▁two ▁cities ▁are ▁situated ▁on ▁the ▁Am n ok ▁river ▁delta ▁at ▁the ▁western ▁end ▁of ▁the ▁border , ▁near ▁the ▁Y ellow ▁Sea . ▁Their ▁water front s ▁face ▁each ▁other ▁and ▁are ▁connected ▁by ▁the ▁S ino - K ore an ▁Friend ship ▁Bridge . ▁ ▁There ▁are ▁ 2 0 5 ▁islands ▁on ▁the ▁Am n ok ▁River . ▁A ▁ 1 9 6 2 ▁border ▁treat y ▁between ▁North ▁Korea ▁and ▁China ▁split ▁the ▁islands ▁according ▁to ▁which ▁eth nic ▁group ▁were ▁living ▁on ▁each ▁island . ▁North ▁Korea ▁poss esses ▁ 1 2 7 ▁and ▁China ▁ 7 8 . ▁Due ▁to ▁the ▁division ▁criteria , ▁some ▁islands ▁such ▁as ▁H w ang g um py ong ▁Island ▁belong ▁to ▁North ▁Korea ▁even ▁though ▁they ▁are ▁on ▁the ▁Chinese ▁side ▁of ▁the ▁river . ▁Both ▁countries ▁have ▁navigation ▁rights ▁on ▁the ▁river , ▁including ▁in ▁the ▁delta . ▁ ▁The ▁source ▁of ▁the ▁Am n ok ▁River ▁is ▁Heaven ▁Lake ▁on ▁Pa e kt u ▁Mountain , ▁which ▁is ▁considered ▁the ▁birth place ▁of ▁the ▁Korean ▁and ▁Man ch u ▁pe op les . ▁This ▁lake ▁is ▁also ▁the ▁source ▁of ▁the ▁T umen ▁River ▁which ▁forms ▁the ▁eastern ▁portion ▁of ▁the ▁border . ▁ ▁There ▁are ▁a ▁significant ▁number ▁of ▁eth nic ▁Kore ans ▁in ▁N ortheast ▁China , ▁particularly ▁in ▁the ▁Yan bian ▁Korean ▁Aut onom ous ▁Pref ect ure . ▁ ▁Trade ▁and ▁contact ▁ ▁Its ▁border ▁with ▁China ▁has