Why was Emperor Jiajing called "Purple Fairy Weng" by posthumous title?

Ji Zixian Weng, Zi Zhe, Xing Ye, Wei Zi, also known as Ziyuan and Zigong, belong to the residence of the emperor in the constellation, and the palace is also known as the Forbidden City, which is the origin; Extreme, vertex and highest position can be used to refer to the throne of the emperor, which is associated with the road number of Xian Weng as an emperor. In fact, this is a title given to himself by Zhu Houzong, Emperor Jiajing of Ming Shizong. Zhu Houzong gave himself a road number three times in his life. For the first time, he claimed to be "Ling Xiaoqing Tong Lei Yuan Yang Miao Yi Yuan Fei Zhenjun"; For the second time, the plus sign was "Nine days in Jiao Hong, all the creatures in Puji took charge of the merits of Yin and Yang, and the four-time Ji Zixian Weng Yang Yi was a real person, Yuan Manxuan Yinghua Kaifu Mo Xiao Zhong Emperor"; For the third time, the plus sign is "Tai Tianxian Holy Spirit Child ternary certificate should be in charge of Wudujing Wanshou Emperor".