Li Siyuan initially wanted to calm the mutineers and then resubmit to Emperor Zhuangzong .
After Li Shaorong accused Zhuangzong of willingly joined the rebellion , Zhuangzong turned against Emperor Zhuangzong and decided to attack south .
Li Siyuan initially wanted to calm the mutineers and then resubmit to Emperor Zhuangzong , but after Li Shaorong accused him of willingly joined the rebellion , he turned against Emperor Zhuangzong and decided to attack south .