鸦片战争是西方资本主义国家发动的首场侵华战争。经过这场战争，英国占领了中国的香港岛。关于鸦片战争的爆发时间，史学界一般定于1840年6月下旬，因6月21、22日，英国侵华远征军的大批舰船，侵入中国领海，并从28日始，封锁广州口岸和珠江口。有少数学者（如车安世、来新夏 The Opium War was the first invasion of China launched by western capitalist countries. After this war, Britain occupied China’s Hong Kong Island. On the outbreak of the Opium War, historians generally set in late June 1840, because on June 21 and 22, a large number of British invasion ships flew into the territorial waters of China, and from the 28th, the blockade of Guangzhou Port and Pearl River Estuary. A few scholars (such as car safety, to the new summer