The forced opium exportation from Great Britain to China, which led to a significant increase of addicts by 1830 and the Emperor Daoguang’s .
To outlaw the sale and use of opium in China, was the primary driver of Britain’s war against China in the middle of the 19th century. Britain became irritated by this and decided to invade China in a first war that lasted from 1839 to 1842. China was defeated in this war and was forced to accept free trade with Britain. Then, in the year 1856, Britain requested that China revise the terms of the Nanking Treaty, in which they had agreed to allow free trade over all of Chinese land, permit the legal commercialization of opium, and other concessions.During the California Gold Rush, immigrants from China made up a significant share of the labour force for the following two reasons:
1) They travelled from China to the harbour in San Francisco, California.
2) They earned pitiful wages while working in the dangerous and unhygienic conditions of the California gold mines.
To know more about chinese visit:
https://brainly.com/question/11484837
#SPJ4