How did foreign countries establish spheres of influence in china?

Foreign countries established spheres of influence in China primarily through a combination of military force, unequal treaties, and economic pressures during the 19th century. Following the Opium Wars, Western powers and Japan forced China to concede territories and grant special trading rights, leading to the establishment of areas where foreign nations had exclusive trading rights and legal jurisdiction. This exploitation was further solidified by treaties such as the Treaty of Nanking (1842) and the Treaty of Tientsin (1856). As a result, various regions of China became dominated by foreign interests, undermining China's sovereignty and control over its own affairs.