German concession in Shantung to Japan was agreed in one of the most controversial decisions of the Peace Conference. As a result, China left the Conference.
Editors. "Peace Conference grants Japan's German concession". The Literary Encyclopedia. First published 01 March 2010; last revised 30 November -1.
[http://www.litencyc.com/php/stopics.php?rec=true&UID=12687, accessed 27 April 2015.]