Since winning the Honourable Mention award at the 2003 Pinnault International Piano Competition, Sin has won several prizes including first prize at the 2005 Virginia Waring International Piano Competition (Junior Concerto Category), Most Outstanding Performer award at the 14th International Festival of Young Musicians 'Kaunas' in Lithuania, first prize at the 17th Ibiza International Piano Competition (Young Pianist Category), first prize at the 3rd International Independent Music Competition 'Individualis' in Ukraine (11–14 years old), second prize at the 1st Schimmel USASU Young Artists International Junior Piano Competition in Arizona, USA (13–15 years old), second prize at the 8th International Krainev Competition for Young Pianists in Ukraine (Junior Section) and first prize at the Viardo International Piano Competition in Texas, USA (17 and Under Category).