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In his late years, Emperor Gaozu started favouring one of his younger consorts, Concubine Qi, who bore him a son Liu Ruyi, who was instated as Prince of Zhao in 198 BC, displacing Lü Zhi's son-in-law Zhang Ao (張敖; Princess Yuan of Lu's husband).
She was the daughter of Princess Yuan of Lu (the only daughter of Emperor Gao (Liu Bang) and his wife Empress Lü) and her husband Zhang Ao (張敖, son of Zhang Er), the Prince of Zhao and later Marquess of Xuanping.
(Princess Yuan of Lu's husband and Zhang Yan's father, Zhang Ao (張敖), had, during Emperor Gao's reign, been the Prince of Zhao, but was removed as part of the policy against non-Liu princes, so Grand Empress Dowager Lü might have felt that making Zhang Yan a prince would be considered to be more justified; when Zhang Ao died in 182 BC, he was posthumously honored as a prince.