1831-07-04 · 虎門大魚山
清道光十一年五月二十五日（1831年7月4日），道光帝下達旨令，指出外國鴉片躉船停泊於虎門大魚山（即今大嶼山），積存煙土並偷運入境，造成嚴重危害，因此指派兩廣總督李鴻賓徹底查禁鴉片，斷絕走私源頭。
On the twenty-fifth day of the fifth month of the eleventh year of the Daoguang reign (4 July 1831), the Daoguang Emperor issued an edict stating that foreign opium hulks anchored at Dayushan near Humen (present-day Lantau) were storing opium and smuggling it inland, causing serious harm, and therefore appointed Li Hongbin, Governor-General of Liangguang, to thoroughly suppress opium and cut off the source of smuggling.
來源 《香港志·總述 大事記》（公元前 5000 年至 2017 年，共 6,500 多條大事）（香港地方志中心） · p.121