China refuses to open trade freely according to the needs of the West. In the Qing Dynasty, China's trade with the West under the monopoly by Chinese traders called "Kong Quan," and confine the trade in Guangzhou city. British trade, which is operated by the East India Company. The trade deficit for China enormous amount. The import of tea from China to many. But can not sell to China freely. East India Company made losses in the past decade, in 1820, the company has found a new product, which can be profitable for the company gracefully opium is grown in India. The status of English unfavorable trade balance improved sharply. It can be seen from between AD 1800-1810, China had a trade surplus of 26 billion dollar, but during the year 1828 to 1836, China had a trade deficit of 38 billion dollar