Phan Thanh Giá # n or Phan Thanh Jan ( æ 1\/2 æ ç , 1796 - 1867 ) was a Vietnamese politician , diplomat and historian . Phan Thanh Giá # n or Phan Thanh Jan ( Hanja : æ 1\/2 æ ç , November 11 1796 -- 1867 ) was a Grand Counsellor at the Nguyá ''