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: Più o meno in questo periodo, Cao divenne l'allenatrice del team di wushu dello Shandong.
reference_flipped: Più o meno in questo periodo, Cao divenne l'allenatore del team di wushu dello Shandong.