Tian Xu
... that Tang Dynasty general Tian Xu designated his youngest son Tian Ji'an as his heir because his sonless wife adopted Tian Ji'an, born of a concubine, as her own?
... that <a class="mw-redirect" href="./Tang_Dynasty" id="mwBi4" rel="mw:WikiLink" title="Tang Dynasty">Tang Dynasty</a> general <b id="mwBi8"><a class="mw-redirect" href="./Tian_Xu_(Tang_Dynasty)" id="mwBjA" rel="mw:WikiLink" title="Tian Xu (Tang Dynasty)">Tian Xu</a></b> designated his youngest son Tian Ji'an as his heir because his sonless wife adopted Tian Ji'an, born of a <a class="mw-redirect" href="./Concubine" id="mwBjE" rel="mw:WikiLink" title="Concubine">concubine</a>, as her own?