This state of affairs began to change with the Second Opium War (1857–60), which culminated in the ransacking and burning of the Summer Palace in Beijing by British and French troops and the resulting Treaty of Tianjin and the Beijing Conventions. These established a whole string of new treaty ports in which Western citizens were granted extra-territoriality; the right to foreign military bases was conceded; missionaries were given freedom to travel in the interior; and further reparations were imposed.

