Special research on the core literacy of high school history discipline ",exploring the history teaching practice under the connotation of high school history core literacy. Teacher Xie Liming made an innovative attempt in the teaching of "Breakthrough in Diplomatic Relations" in the second lesson of Compulsory Five. On the basis of the teaching of "Returning to the United Nations" in the previous lesson, with Nixon's visit to China as the topic of "A Week that Changed the World", the teaching content was reorganized, and the following questions were put forward: "This week's back and forth", "This week changed the world" and "Did the world change this week or did this week change the world? "Three interlocking links lead students into the extraordinary course of normalization of Sino-US relations more than 40 years ago. Precious historical photos, rich written materials and natural and vivid stories have deeply attracted students and teachers. Students simulate Chinese and American negotiators 1972. In the process of drafting the Sino-US Joint Communique, the arguments between the two sides about anti-hegemony and the withdrawal of American troops from Taiwan Province Province well reflected the scientificity and agility of students' historical thinking, and also made them realize that in diplomatic activities, they should not only adhere to the firmness of the principled position of safeguarding national interests, but also pay attention to the flexibility of struggle strategies, and understand that diplomacy is sometimes an art of compromise. Teacher Chen Tianning, a history researcher in Ningbo, believes that this course is a successful exploration of infiltrating the core literacy of history.