He twice served as China s envoy to the United States and in his diplomatic practice he developed rich thought on diplomacy including ideas of equal diplomacy,balance diplomacy and cultural diplomacy.

Metternich practiced flexibly the diplomacy of the balance of power,and succeeded one af-ter another.

Balance of Power Diplomacy and the Dilemma of US Foreign Policy in the Middle East;

Because of the complex factors, the United States was forced to give up its investment plan and made the balance of power diplomacy failure.

Analysis of the new characteristics of Korean foreign policy in the 21the century;

Research Approaches and Methodology on Indonesia s Foreign Policy;

Allied foreign policy of Delcass before first World War;

It has exerted a profound influence on Bush administration s foreign policies during its first term,especially after the "9·11" terrorist attack,mainly in the US-EU relations,the Asia-Pacific area,and the Middle East.

The author pinpoints this concept in the context of foreign policies and then explores four important effects of ideology on foreign policies.

We can see the cognition to the outside of ruling class was more liberal from positive and open foreign policies of the Tang Dynasty,but this cognition was multi-limiting,and often mixed with the consciousness of "Chinese tribes in the east" of feudal emperors to minority nationality,and often showed an equivocal and wavering attitude in the foreign affairs.