Britain Imports Opium to China 1815: Britain began trading Opium to China in 1773, in that year, they became the leading opium provider. The British East India Company developed a monopoly over the cultivation of opium.
Opium War 1839: China would sell Britain tea, but would not buy British products. To account for the loss of silver, Britain started to import opium illegally and demanded silver as payment. Britain demanded to have more ports opened to western traders, concessions for the lost opium before the war, and established diplomatic relations after their victory.
Taiping Rebellion 1864: It was a revolt against the Qing dynasty in China. The revolt was caused over a dispute in religious beliefs. The rebels seized Nanjing city for over a decade, but the rebellion failed. The rebellion had taken over 20 million lives from 1850- 1864.
Spheres of influence 1890: Britain needed to establish a sphere of influence to better their trading opportunity. A country or area in which another country has power to affect developments although it has no formal authority.
Boxer Rebellion 1900: Boxers attacked Christian churches and missions, slaughtering thousands of Chinese Christians. They sieged the foreign legations in Beijing and Tianjin.