How to release the burden from so-called “Unequal Treaties” was one of the main themes of 1920's Chinese Diplomacy. The Canton Government led by KMT engaged in “Revolutionary Diplomacy”, which claimed to eliminate all treaties at one stroke. At the same time, Peking Government strived to modify Treaties through its “Treaty Revision Diplomacy”. This line is less well known but not less important compare with KMT's. After World War I, the Peking's line formatted and implemented impressively in the year of 1919. In that year, Peking Government stressed its treaty revision campaign on three directions. Firstly, toward the defeated countries, ie. German and Austria, Chinese delegates “Provisions for Insertion in the Preliminaries of Peace” to Paris Peace Conferance, asked to relinquish these two countries' treaty privileges in China and to negotiate new treaty on the principles of equality and reciprocity, which was basically accepted by the Conference. Secondly, toward Allied Powers, Chiese delegat as submitted a memo named “Questions for Readjustment” to the Peace Conference, hoped all limitations upon her sovereignty might be removed, which was politely rejected by the Conference. Thirdly, toward all non-treaty countries including new-established states, the President in Peking issued a Mandate declaring that all these countries wishing to enter into treaty relations with China should do so on the basis of equality. Hence China negotiated with several non-treaty countries on this line in 1919, and reached a successful example of totally equal treaty with Bolivia in the end of 1919. After examining relevant case studies based on first-hand archives, the author conclude that in the year of 1919 the Peking Government's “Treaty Revision Diplomacy” had a remarkable development, which become a solid basis for the forthcoming Right Recovery Movement in both Peking and Naking periods.