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
British Hong Kong to China, even though there had been several upsurges of Chinese nationalism. He explained: In the 1920s, the working class Chinese of Hong Kong did not have a good reason to rally around the Hong Kong government, and they were more susceptible to appeals based on Chinese nationalism. Consequently, the call of the Communists was basically heeded by the working men, and their actions practically paralysed the colony for a year. By the [end of the] 1960s, however, the attempts by the Hong Kong government to maintain stability and good order which helped improve everyone's living conditions, and ... the