Since the end of World War II, the world pattern has changed and entered the "Cold War" situation of the two major camps led by the United States and the Soviet Union, and China and the United States have also entered an opposition.

Since World War II ended, the world pattern has changed, entering the " Cold War " situation of the two major camps led by the United States and the Soviet Union, and China and the United States have also entered an opposition. In the 1950s, China and the Soviet Union were allies, and we were still in the early days of the founding of the People's Republic of China. During this period, as the "big brother", the Soviet Union also provided us with many assistance to help China build military and heavy industrial projects, laying a great foundation for China's industrial system.

However, in the 1960s, the relations between China and the Soviet Union deteriorated, and there was no breakdown of diplomatic relations between the two countries, but during this period there was less cooperation and armed conflicts occurred. In the 1970s, the United States fell into a social crisis after the Vietnam War and lost its advantage in the "Cold War". In order to have greater strength to compete with the Soviet Union, the United States took the initiative to ease its relations with China. After the US President Nixon visit to China in 1972, Sino-US relations broke the ice and formally established friendly relations.

The recovery of Sino-US relations has strengthened exchanges between the two countries. In June 1998, US President Clinton also came to Peking University to give a speech, hoping to enhance the relationship between the two countries. At that time, Peking University had just ended the celebration of the 100th anniversary of its founding. After Clinton finished his speech, there were seven places among Peking University students to ask questions to Clinton. Before this, the school told students to pay attention to friendly questions, but most of the questions raised by these students in the end were sharp.

One of the female students asked Clinton about democracy, freedom and human rights in the United States. After Clinton answered, another female student from the Chinese department, Ma Nan, refuted Clinton when speaking. She believed that the freedom advocated by the United States was actually not free at all, and there was real freedom and democracy in China. China's vigorous development today is the result of Chinese people's free choice and efforts. She finally told Clinton: Only those who truly respect others' freedom can understand true freedom.

Clinton was silent in the face of such a problem. Later news reported this speech, and Ma Nan became a celebrity because of this. However, Ma Nan, who disagrees with the United States so much, ends up marrying American Kou Bailong . It is said that Kou Bailong came to China to teach, and Ma Nan was responsible for picking up the airport, and later became his Chinese teacher. Later, the two got married and gave birth to a daughter. However, the good times did not last long because the man had an extramarital affair. The two agreed to divorce and their daughter was taken away by the man. Since then, Ma Nan has never seen her daughter again.

Many people think that Ma Nan married an American for the purpose of the American green card, which is too different from her approach to questioning Clinton at the time. Later, Ma Nan responded that she did not have an American green card, and her words and deeds at Peking University were to use the camera to attract the attention of her ex-boyfriend. We don’t know what the truth is. Ma Nan’s marriage not only failed, but he could not live with his daughter in the end, which is also her misfortune. 23 years have passed, and now Ma Nan is an ordinary person, working as a librarian in a school in , Xiamen .