Meanwhile , in 812 , Tian Ji'an himself fell ill from a stroke .
Tian Ji'an 's wife Lady Yuan summoned the officers and Tian Ji'an 's his 10 - year - old son Tian Huaijian deputy military governor .
Meanwhile , in 812 , Tian Ji'an himself fell ill from a stroke , and his wife Lady Yuan summoned the officers and named his 10 - year - old son Tian Huaijian deputy military governor .