Since retiring from teaching two years ago, Sung has been pursuing a Master's degree in Taiwanese literature at National Chung Hsing University. Though busy working on his thesis, he already has plans to write a history of Taiwan in Taiwanese.
兩年前他自教職退休之後，在中興大學台灣文學研究所攻讀碩士，最近雖忙於撰寫論文，但已擬好以台語文書寫台灣歷史的大型寫作計畫。