Li Linfu
Later when Chancellor Li Linfu tried to depose the new Crown Prince Li Yu, he tried to persuade Emperor Xuanzong to create Li Cong as Li Cong was the eldest, but Emperor Xuanzong silently replied, "Cong, my eldest son, in early years when hunted in the imperial garden, his face was hurt and badly injured." Implying that an injured face was unfit for an emperor, and this might be the reason why Li Cong was always bypassed and never became crown prince. Though Li Linfu still insisted, Emperor Xuanzong never had Li Yu replaced, as Li Yu always behaved well at that time.