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 Chinese, the Second Convention of Peking was signed on 9 June. Since the foreign powers had agreed by the late 19th century that it was no longer permissible to acquire outright sovereignty over any parcel of Chinese territory, and in keeping with the other territorial cessions China made to Russia, Germany and France that same year, the extension of Hong Kong took the form of a 99-year lease. The lease consisted of the rest of Kowloon south of the Shenzhen River and 230 islands, which became known as the New Territories. The British formally took possession on 16 April