The outcome of the Opium Wars primarily involved significant territorial, political, and economic changes in China resulting from the treaties imposed by Western powers. The First Opium War (1839-1842) ended with the Treaty of Nanking, which ceded Hong Kong to Britain, opened five treaty ports to British trade, and granted extraterritorial rights to British citizens.
The Second Opium War (1856-1860) further expanded foreign influence in China. The treaties that followed allowed for additional ports to be opened, sanctioned the opium trade, and legalized the missionary activities of Western nations.
Overall, the outcomes of both wars marked the beginning of what is often referred to as China's "Century of Humiliation," characterized by foreign control and territorial concessions, leading to social unrest and various uprisings, including the Taiping and Boxer Rebellions, which were eventually suppressed by the combined efforts of Western powers.