The Daoguang Emperor died on 26 February 1850 at the Old Summer Palace, 8 km/5 miles northwest of Beijing, being the last Qing emperor to pass away in that Palace before it was burnt down by Anglo-French troops during the Second Opium War, a decade later. He was succeeded by his eldest surviving son, Yizhu, who was later enthroned as the Xianfeng Emperor. The Daoguang Emperor failed to understand the intention or determination of the Europeans, or the basic economics of a war on drugs. Although the Europeans were outnumbered and thousands of miles away from logistical support in their native countries, they could bring far superior firepower to bear at any point of contact along the Chinese coast. The Qing government was highly dependent on the continued flow of taxes from southern China via the Grand Canal, which the British expeditionary force easily cut off at Zhenjiang. The Daoguang Emperor ultimately had a poor understanding of the British and the industrial revolution that Britain and Western Europe had undergone, preferring to turn a blind eye to the rest of the world, though the distance from China to Europe most likely played a part. It was said that the emperor did not even know where Britain was located in the world. His 30-year reign introduced the initial onslaught by Western imperialism and foreign invasions that would plague China, in one form or another, for the next one hundred years.