The Bowring Treaty is the name given to an agreement signed on April 18, 1855 between the United Kingdom and the Kingdom of Siam that liberalized foreign trade in Siam. The Treaty was signed by King Mongkut of Siam and Sir John Bowring, Governor of Hong Kong and Britain's envoy. Sir John Bowring, KCB (Chinese translated name: 腳圭,腳艶 or ) (17 October 1792  23 November 1872) was an English political economist, traveller, miscellaneous writer, polyglot, and the 4th Governor of Hong Kong.