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
Hong Kong–North Korea relations and People's Republic of China. Hong Kong joined the embargo imposed on the communist bloc during the second half of the 20th century. Following the transfer of sovereignty of Hong Kong to China, North Korea was able to open a Consulate-General in February 2000 by virtue of its diplomatic relations with Beijing, having previously not been allowed to establish a trade mission during British rule. The Consulate General is located in Wan Chai on Hong Kong Island. Hong Kong had been involved in two cases of North Korean defectors. The first was in 1996, by then a family of 16