Once Li Siyuan arrived at Xingtang , however , his own soldiers mutinied .
Once Li Siyuan arrived at Xingtang , however , his own soldiers forced him and his deputy commander , Li Shaozhen , into joining the mutiny .
Once Li Siyuan arrived at Xingtang , however , his own soldiers mutinied and forced him and his deputy commander , Li Shaozhen , into joining the mutiny .