claim: Maria Theresa ruled for 40 years.
evidence: Sir Richard Mark Evans -LRB- Chinese  : 伊文思爵士 , 15 April 1928 -- 24 August 2012 -RRB- was a British diplomat who was the ambassador to the People 's Republic of China from January 1984 to May 1988 , during which he and Zhou Nan , the Chinese representative , initialed the Sino-British Joint Declaration on 26 September 1984 .. Chinese. People's Republic of China. British. United Kingdom. diplomat. diplomat. Zhou Nan. Zhou Nan. Sino-British Joint Declaration. Sino-British Joint Declaration