Sino-US Joint Co ue(1972) Liason office established in both sides (1973) PRC's three principles for normalizing diplomatic relationship (1973) Sino-US concluding agreement of tablishing diplomaticties and issuing the second joint communique Dec 1978) The establishment of the diplomatic relations (January 1, 1979)The Sin0-US Joint Communiqué (1972) Liason office established in both sides (1973) PRC’s three principles for normalizing diplomatic relationship (1973) Sino-US concluding agreement of establishing diplomatic ties and issuing the second joint communiqué ( Dec. 1978) The establishment of the diplomatic relations ( January 1, 1979)