The Five Principles are: mutual respect for sovereignty and territorial integrity, mutual non-aggression, non-interference in each other's internal affairs, equality and mutual benefit, and peaceful coexistence. They were first set forth by Premier Zhou Enlai in his talk to the Indian delegation at the start of the negotiations that took place in Beijing from December 1953 to April 1954 between representatives of the Chinese and Indian governments on relations between the two countries in Tibet. Later, the Five Principles were formally written into the preface to the "Agreement Between the People's Republic of China and the Republic of India on Trade and Intercourse Between the Tibet Region of China and India". Since June 1954, when the Five Principles were included in the joint communique issued by Premier Zhou Enlai and Prime Minister Jawaharlal Nehru, they have been adopted in many other international documents and have become widely accepted as norms for relations between countries.