performed an erotic dance
... that two dancing girls performed an erotic dance in front of Tuyuhun soldiers, while Chai Shao of Tang attacked them from the rear with his cavalry?
... that two dancing girls <i id="mwCjE">(statue pictured)</i> <b id="mwCjI"><a href="./Tuyuhun_invasion_of_Gansu" id="mwCjM" rel="mw:WikiLink" title="Tuyuhun invasion of Gansu">performed an erotic dance</a></b> in front of <a href="./Tuyuhun" id="mwCjQ" rel="mw:WikiLink" title="Tuyuhun">Tuyuhun</a> soldiers, while <a href="./Chai_Shao" id="mwCjU" rel="mw:WikiLink" title="Chai Shao">Chai Shao</a> of <a href="./Tang_dynasty" id="mwCjY" rel="mw:WikiLink" title="Tang dynasty">Tang</a> attacked them from the rear with his cavalry?