context: Cao's first international debut was at the 2003 World Wushu Championships where she was the world champion in women's changquan.
source: Around this time, Cao became the coach of the Shandong Wushu Team.
reference_original: Während dieser Zeit wurde Cao die Trainerin des Shandong Wushu-Teams.
reference_flipped: Während dieser Zeit wurde Cao der Trainer des Shandong Wushu-Teams.