Tongtong Sun was born in China in 1991.
At the tender age of 10, she began violin lessons with Prof. Binyou Zhou at a music school affiliated with the Shanghai Conservatory of Music. At the age of 15, she took chamber music lessons with Prof. Jensen Horn-Sin Lam. Since 2012, she has been studying at the University of Music and Performing Arts Vienna under Prof. Jan Pospichal. In 2020 she graduated with distinction.
She has performed as a chamber musician and soloist in Canada, Singapore, China as well as Europe. She has participated in numerous competitions and won prizes. Among others, she was a finalist in the Yehudi Menuhin International Violin Competition in 2006 and received 2nd prize in the International Violin Competition Kloster Schöntal in 2007.
From 2008 to 2012, she played in the Simply Quartet, which won 1st prize in the Shanghai Chamber Music Competition in 2009 and received the special prize as "the most promising young string quartet" in the Beijing International Music Competition in 2011. Furthermore, she was a member of the ensemble xx. jahrhundert Wien.
Since 2018 Tongtong Sun is a member of the ORF Radio Symphony Orchestra Vienna.