Yuwen Tai
In spring 556, Yuwen Tai was pondering the issue of succession. Yuwen Jue was born of the Princess Pingyi, but Yuwen Yu was older and married to the daughter of one of his chief generals, Dugu Xin. On the advice of Li Yuan (), who argued that the son of a wife always had precedence over the son of a concubine, Yuwen Tai made Yuwen Jue his heir apparent.