During the 2014 Umbrella Revolution, a campaign against perceived violations of mainland China in HKSAR, Chinese officials concluded for the first time that China considered the joint declaration “invalid,” according to a British MP.  This conclusion was found to be “manifestly erroneous” by a senior Hong Kong lawyer and rejected by the British Foreign Minister, who stated that the document was a legally binding agreement that had to be respected.   Rita Fan, then Hong Kong`s only representative on the Standing Committee of the National People`s Congress in Beijing, stated that responsibility for the UK`s oversight had expired and that the joint declaration did not provide for universal suffrage.  Britain quickly returned to this unofficial part of the agreement and attacked Kowloon Walled City in 1899 to find it abandoned. They didn`t do anything with it, or the outpost, and the question of ownership of Kowloon Walled City was directly in the air. The outpost consisted of a yamen, as well as buildings that grew up in sparsely populated neighborhoods from the 1890s to the 1940s. This group was a connection organ, not a power organ, where each party could send up to 20 support coworkers. It is expected to meet at least once a year at each of the three sites (Beijing, London and Hong Kong). It was established in Hong Kong on July 1, 1988. It should also help HKSAR maintain and develop economic and cultural relations and conclude agreements on these issues with the relevant states, regions and international organisations, and could therefore create specific sub-groups.
Between 1985 and 2000, the Joint Liaison Group held 47 plenary sessions, 18 in Hong Kong, 15 in London and 14 in Beijing. Hong Kong`s autonomy was guaranteed by the “one country, two systems” agreement, enshrined in the 1984 Sino-British Joint Declaration signed by then-Chinese Prime Minister Zhao Ziyang and British Prime Minister Margaret Thatcher. One of the most important achievements has been to ensure the continuity of the independent judicial system in Hong Kong, including agreements in the areas of commercial navigation, civil aviation, nuclear materials, whale fishing, underwater telegraph, space and many others.