The Battle of Shanhai Pass (山海关之战), fought in the Great Wall's Shanhaiguan, China in 1644, was the decisive battle leading to the formation of the Qing Dynasty in China. Qing leader Dorgon, along with former Ming general Wu Sangui, defeated rebel Li Zicheng's forces, allowing Dorgon and the Manchus to rapidly conquer Beijing and replace the Ming Dynasty.
7.treasure ships:－Ming China sent out enormous goods of ship into the Indian Ocean, commande by the eunch admiral Zheng He. -Transmit China's peaceful message, bring gifts to China's neighbors. Tributary state system, bulid network support them.