一口通商
By the late 18th century, British traders felt confined by the Canton System and, in an attempt to gain greater trade rights, they lobbied for an embassy to go before the emperor and request changes to the current arrangements. The need for an embassy was partly due to the growing trade imbalance between China and Great Britain, driven largely by the British demand for tea, as well as other Chinese products like porcelain and silk. The East India Company, whose trade monopoly in the East encompassed the tea trade, was obliged by the Qing government to pay for Chinese tea with silver. To address the trade deficit, efforts were made to find British products that could be sold to the Chinese.