The Treaty of Tientsin was signed in 1856 between the Qing Dynasty of China and several Western powers, including Britain, France, Russia, and the United States. It marked the end of the Second Opium War and aimed to expand foreign trade and diplomatic relations in China. The treaty allowed foreign embassies in Beijing and opened additional ports for trade. In addition to trade provisions, the treaty included clauses that granted religious freedom to Christians in China and established a framework for the protection of foreign nationals. The Treaty of Tientsin significantly altered China's interactions with Western nations and set the stage for further foreign influence in the region.