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
Military history of Hong Kong the Empire of Tang finished conquest the southern China. The empire built a military and naval base in Tuen Mun to ensure the safety of Guangzhou and the seas around Hong Kong. The navy of Tuen Mun pacified the water against pirates. Hong Kong has never had its own military forces because it has never been a sovereign state, except voluntary auxiliary force like The Royal Hong Kong Regiment (The Volunteers). All defence matters have been dependent on the state which controls Hong Kong. Before the British handover to PRC sovereignty, defence was provided by the British military, who stationed