In the winter of the tenth year of Chongzhen in the Ming Dynasty (1637), the Forbidden City was enveloped in a double cold current. The twenty-nine-year-old Chongzhen Emperor Zhu Youjian suddenly launched the "Jiashen Coup" and used thunderous means to eradicate the corrupt group headed by Wen Tiren and Xue Guoguan, kicking off the iron-fisted reform. This emperor, who had been deeply involved in party disputes, was determined to regain his Yongle style after discovering the "Sea Country Map" left behind by Zheng He during his voyages to the West. Faced with the 100,000 Huang Taiji cavalry outside the customs and the riots of refugees in the Central Plains, Chongzhen asked Song Yingxing, a disciple of Xu Guangqi, to form the "Tiangongyuan", arm the new army with red-coated cannons and flintlock rifles, and at the same time dispatched Jinyi guards to secretly carry out "decapitation operations". When Li Zicheng hated Tongguan and Dorgon died violently in Shenyang, the first steam warship of the Ming Dynasty had risen in Yanziji, Nanjing. A hundred years later, as the steam bell tower of the Forbidden City was ringing, the eldest princess of the Ming Dynasty, Zhu Yuyao, was leading a diplomatic mission to discuss the Eurasian railway plan with Louis XIV at the Palace of Versailles...
