Why didn't the Ming Dynasty retreat to Zhongdu [Fengyang] to resist the late Jin Dynasty?

Emperor Chongzhen was disheartened. Second, Fengyang has no imperial spirit, which means it is not as good as the Dragon Boat and Tiger Tower in Nanjing or the eternal imperial capital in Chang 'an. Third, the landlord class in Anhui can't provide strong support (Guangxu emperor Zhongxing only got the capital to win the rivers and mountains with the support of Yingchuan gentry)