Kammala jumla mai zuwa: A ƙarshen shekara ta 2011 Shim ya sanya Koriya ta Kudu ta Koriya ta Kudu a gasar zakarun duniya a lokacin da yake da shekaru 14. A watan Janairun 2012, ta shiga cikin
wasannin Olympics na matasa na hunturu da aka gudanar a Innsbruck, inda ta share duka nau'ikan mutum (500 m, 1000 m). Ta kuma sami lambar tagulla a tseren mita 3000 da aka haɗu da ƙasa / jinsi a matsayin memba na ƙungiyar da aka haɗu da 'yan wasan motsa jiki da ke wakiltar ƙasashe daban-daban.