<prompt> Translate the following text to SwahiliNegotiations began, and in 1984 Prime Minister Margaret Thatcher signed the Sino-British Joint Declaration, in which Britain confirmed the transfer of the New Territories and all of Hong Kong to China in 1997.  <response>: Mnamo mwaka wa 1984, Waziri Mkuu Margaret Thatcher alisaini Azimio la Pamoja la China na Uingereza, ambalo lilithibitisha uhamisho wa Wilaya Mpya na Hong Kong nzima kwa China mnamo 1997. 