There are three reasons:
First, Judy was influenced by her old man Zhu Yuanzhang's extravagant and murderous personality and theory, and she was also an excellent killer, which made the whole city of Nanjing wail and wail. I feel there is too much blood in Nanjing. In the square of the Forbidden City in the Ming Dynasty, as far as the porch and the Yuhuatai with Guo, there was blood everywhere, which made people feel uneasy.
Second, because Judy has been guarding Yanjing for many years, she knows the important position of this place in the military. Plus your own large army, there are many more in Yanjing.
Third, Li Shangshu and "Jiangxi School" Feng Shui master Liao and others think that Yanjing has a so-called "auspicious land", which is usually called a land of feng shui.
Thank you~