These two trends are the same, both are traditional energy sources, and the demand is similar.

1856- 1860 The Second Opium War was a war of aggression against China launched by Britain and France to expand their rights and interests of aggression. The American and Russian fishermen benefit. The Tianjin Treaty and the Beijing Treaty signed by the four countries forced the Qing government to lose more territory and sovereignty in China, and foreign aggression expanded to coastal provinces and the middle and lower reaches of the Yangtze River. The degree of semi-colonization of China society has further deepened.