今年1月,中国国家副主席习近平出席美国总统理查德·尼克松访华40周年的纪念活动并致辞。尼克松的那次访问具有里程碑意义,最终于1972年2月28日成功发表《上海公报》,这份精心拟订的外交协议开启了两国关系正常化进程,用北京大学教授、中美关系专家牛军的话来说,两国"如今谁 In January this year, Chinese Vice President Xi Jinping attended the speech commemorating the 40th anniversary of U.S. President Richard Nixon’s visit to China. Nixon’s landmark visit made a landmark announcement on February 28, 1972, and the elaborated diplomatic agreement opened the normalization process of relations between the two countries. He used professors from Peking University, specialists in Sino-U.S. Relations In the words of the military, both countries nowadays