During 1880’s the conflict between China and Britain was reached the peak due to the Opium trade banned in China by the Emperor Qing. The opium war divide into two wars, First Opium War (1839 – 1842) and Second Opium war (1856 – 1860).
Chine used Opium for medicinal purpose, later the European practiced opium to Chinese people for smoking which cause dramatic affects whole Chinese health. British export opium to china, 128 tonnes in 1729, 256 tonnes in 1790 and after the first opium war it increased more than 4,480 tonnes.
Due to the Opium war china forced to sign in the “Peace Treaty of Nanking” which allows the british to trade opium in china without any bans and "Treaty of Tien-tsin" signed in Tianjin which leads to open the china ports for foreigner trade.