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: Por esta época Cao se convirtió en la entrenadora del equipo Shandong Wushu.
reference_flipped: Por esta época Cao se convirtió en el entrenador del equipo Shandong Wushu.