Waves of mass migrations from Hong Kong villagers exercised their right of abode in the United Kingdom and left for Europe. In 1967, a series of large-scale riots erupted in Hong Kong, causing social instability. These events led some of the richer Hong Kong residents to move abroad. Emigration took place to countries in Southeast Asia, South Africa or South American countries. This wave did not come to a rest until the mid-1970s. On the 19th of December 1984, the People's Republic of China and the United Kingdom signed the "Sino-British Joint Declaration", validated the 1997 transfer of sovereignty over Hong Kong to China. The declaration prompted
Executive Council of Hong Kong below Government House (former residence of the British Governor of Hong Kong). Prior to the handover, the Provisional Executive Council of Hong Kong, headed by Tung Chee Hwa, met in Shenzhen or Tung's office on the 11th floor of the Asia Pacific Finance Tower in Hong Kong. Members of the outgoing British Hong Kong ExCo were not permitted to attend this body. Both Executive Council sittings were on Tuesdays. Executive Council of Hong Kong The Executive Council of Hong Kong (ExCo; ; Chinese name before the transfer of sovereignty: 行政局) is a formal body of advisers to the Chief Executive