次年，武则天废中宗为庐陵王，另立李旦（武则天第四子）为皇帝，是为唐睿宗，旋即废黜。
The year , Wu Zetian dethroned him as King of Luling , made Li Dan ( her fourth son ) the emperor , that 's Tang Ruizong ， but uncrowned him soon .
庐陵王