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: Nessa época, Cao se tornou técnica do time de Shandong Wushu.
reference_flipped: Nessa época, Cao se tornou técnico do time de Shandong Wushu.