Flag of Hong Kong Kong was granted on 21 January 1959 by the College of Arms in London. The Hong Kong flag was revised in the same year to feature the coat of arms in the Blue Ensign flag. This design was used officially from 1959 until Hong Kong's transfer of sovereignty in 1997. Since then, the colonial flag has been appropriated by protestors, such as on the annual 1 July marches for universal suffrage, as a "symbol of antagonism towards the mainland", along with a blue flag featuring the coat of arms, used by those advocating independence. Before Hong Kong's transfer of sovereignty,
British Hong Kong the Convention of Chuenpi during the First Opium War. On 20 January, Elliot announced "the conclusion of preliminary arrangements", which included the cession of Hong Kong Island and its harbour to the British Crown. Elliot chose Hong Kong instead of Chusan because he believed a settlement further east would cause an "indefinite protraction of hostilities", whereas Hong Kong's harbour was a valuable base for the British trading community in Canton. British rule began with the occupation of the island on 26 January. Commodore Gordon Bremer, commander-in-chief of British forces in China, took formal possession of the island at Possession Point,