When did the Transfer of sovereignty over Hong Kong happen?
1994 Hong Kong electoral reform The 1994 Hong Kong electoral reform was a set of significant constitutional changes in the last years of British colonial rule in Hong Kong before the handover of its sovereignty to the People's Republic of China on 1 July 1997. The reform proposal was carried out by the last governor Chris Patten to largely broaden the electorate base of the last three-tiers elections in 1994 and 1995:
Sino-British New Equal Treaty The Sino-British New Equal Treaty, or the Sino-British Treaty for the Relinquishment of Extra-Territorial Rights in China was a bilateral treaty concluded between the British and the Chinese governments in Chongqing on 11 January 1943. The formal name of the treaty was "Treaty Between His Majesty in Respect of the United Kingdom and India and His Excellency the President of the National Government of the Republic of China for the Relinquishment of Extra-Territorial Rights in China and the Regulation of Related Matters".