The Collaborative International Dictionary of English v.0.48:

Wai Wu Pu \Wai Wu Pu\ [Chinese wai foreign + wu affairs + pu
   office.]
   The Department of Foreign Affairs in the Chinese government.

         The Tsung-li Yamen, or Foreign Office, created by a
         decree of January 19, 1861, was in July, 1902,
         superseded by the formation of a new Foreign Office
         called the Wai Wu Pu, . . . with precedence before all
         other boards.                            --J. Scott
                                                  Keltie.
   [Webster 1913 Suppl.]