There existed a remarkable changes of Beijing built from Yuan Dynasty to Ming Yongle Reign marked by the outer city built in the 32nd Year of Jiajing Reign of the Ming Dynasty (Year 1553).

• 以明代嘉靖三十二年(1553年)修建北京外城为标志,由元大都至明永乐的北京帝都发生了较大的变化,其中,天朝南端商业活动的繁荣对城市格局的改变非常关键。