The Opium imperialism ... what happen ?

For centuries china called itself the middle kingdom , this meant that china was at the center of the world . China felt that it did not need everything from the rest of the world . The british had a negative balance of trade , this means that the british were buying more than they were selling . "They decided to bring in opium mixed with tobacco to promote opium smoking.". It was made in dies and then shipped to china by british merchants. The opium war was a battle of drugs over China and England. England won the war against China, got five ports to trade, every crime was convicted as if in England, but really in China. Also China was forced to sign the treaty of Nanking. it was called the Opium war because that was the drug that had been traded between China and England for sereval years. England was able to win the war, because of the advance technology that they had over China. Leading to a crushing defeat on China's account.