PTT JYPNATION板的板友Miseryz分享了一個影片：
101學年度臺南市音樂比賽絲竹室內樂復興國中
https://www.youtube.com/watch?v=k-RtY54Z2XA

影片當中彈古箏的女生看起來很像是子瑜，於是向子瑜媽詢問，瑜媽說就是子瑜沒錯，不過去韓國之後都沒有練習，所以現在大概忘光光了XD

This video shot in October 2012 in Taiwan, just before Tzuyu came to Korea. It’s a Tainan City  student musical competition. Tzuyu represented her school – FuHsing Junior High School. Her mother revealed maybe Tzuyu already forgot how to play Guzheng right now because she didn’t practice it in Korea.

影片5:40處可以清楚看到子瑜的面貌

然後前半段都沒有子瑜的part，要看子瑜彈古箏請快轉到後半段XD