Held at the ECO Diplomatic Library, at the workshop titled "Teachers' Advices", Dr. Ralph Langen, a University professor and an international affairs advisor in Berlin, Germany, who had travelled to Iran at the invitation of the Hafez Cultural Institute and Goethe Institute, talked on the use of the advices given by the countries' arts and cultural figures regarding the effective ways of oral communication as well as the principles of Int'l code of conduct and formalities. The workshop was attended by ECI staff, members of Hafez and Goethe Institutes, IRIB producers and anchors and other lecturers.