▁planned ▁to ▁return ▁home , ▁in ▁the ▁end , ▁half ▁of ▁workers ▁en list ed ▁ended ▁up ▁remaining ▁in ▁Germany . ▁Through out ▁the ▁ 1 9 7 0 s , ▁they ▁st aged ▁protest s ▁demand ing ▁the ▁right ▁to ▁stay , ▁cit ing ▁their ▁contributions ▁to ▁the ▁economy ▁and ▁health ▁care ▁system ; ▁in ▁the ▁end , ▁the ▁West ▁German ▁government ▁ref rained ▁from ▁exp elling ▁those ▁whose ▁work ▁contract s ▁had ▁exp ired , ▁instead ▁letting ▁them ▁move ▁on ▁to ▁other ▁work . ▁ ▁North ▁and ▁South ▁Korea ▁v ied ▁for ▁influence ▁among ▁the ▁Korean ▁community ▁in ▁West ▁Germany ▁during ▁the ▁ 1 9 6 0 s ▁and ▁ 1 9 7 0 s ; ▁North ▁Korea ▁sent ▁oper atives ▁to ▁West ▁Germany ▁dis gu ised ▁as ▁profess ors ▁in ▁order ▁to ▁rec ruit ▁among ▁the ▁Korean ▁community ▁there . ▁In ▁ 1 9 6 7 , ▁South ▁Korea ▁for ci b ly ▁extr ad ited , ▁without ▁the ▁consent ▁of ▁the ▁West ▁German ▁government , ▁a ▁number ▁of ▁Kore ans ▁sus pected ▁of ▁sp ying ▁for ▁the ▁North , ▁the ▁most ▁famous ▁of ▁whom ▁was ▁composer ▁and ▁later ▁German ▁citiz en ▁Is ang ▁Y un . ▁They ▁were ▁tort ured ▁to ▁extract ▁false ▁conf essions , ▁and ▁six ▁were ▁sent enced ▁to ▁death . ▁West ▁Germany ▁exp elled ▁three ▁South ▁Korean ▁diplom ats ▁in ▁the ▁after math ▁of ▁the ▁incident , ▁and ▁seriously ▁considered ▁breaking ▁off ▁diplom atic ▁relations ▁with ▁South ▁Korea . ▁ ▁However , ▁they ▁decided ▁against