In 1872, the Tongzhi Emperor turned 17. Under the guidance of the Empress Dowager Ci'an, he was married to the Jiashun Empress. The empress's grandfather, Prince Zheng, was one of the eight regents ousted from power in the Xinyou Coup of 1861. He had been Cixi's rival during the coup and was ordered to commit suicide after Cixi's victory. As a consequence, there were tensions between Cixi and the empress, and this was often a source of irritation for Cixi. Moreover, the empress's zodiac symbol of tiger was perceived as life-threatening by the superstitious Cixi, whose own zodiac symbol was a goat. According to Cixi's belief, it was a warning from the gods that she would eventually fall prey to the empress.