On 1 July 2008, Sun was loaned to Austrian Bundesliga side Austria Wien on a one-year deal with the possibility of a one-year extension, with this deal he would become the first ever Chinese footballer to play in the Austrian Bundesliga.
On 1 July 2008, Sun was loaned to Austrian Bundesliga side Austria Wien on a one-year deal with the possibility of a one-year extension. Sun became the first ever Chinese footballer to play in the Austrian Bundesliga.