In 5, Wang Mang poisoned Emperor Ping after becoming concerned that Emperor Ping was going to take vengeance for Wang Mang's executing of his uncles. He also began to lift the façade of faithfulness to the Han in Grand Empress Dowager Wang's presence, effectively forcing her to grant him the title of acting emperor (假皇帝) against her wishes and to approve his selection of Liu Ying, a great-great-grandson of Emperor Xuan, as the new emperor (as Emperor Ruzi). In 8, Wang Mang usurped the throne and established the Xin Dynasty. When he demanded that Grand Empress Dowager Wang turn over the imperial seal, she initially refused, but eventually relented.