The so-called mission, in ancient times, refers to the messenger being ordered to travel, and later extended to shoulder important tasks and responsibilities. People living in society should not only complete their own life course, but also complete various life tasks. Among them, the great historical figures and great historical responsibilities shouldered by people are people's historical missions.

Second, facing the challenges of a complex and ever-changing international environment.

In today's world, peace, development and cooperation are the trend of the times. The international situation is undergoing new profound changes, the trend of world multipolarization and economic globalization continues to develop in twists and turns, the unstable factors affecting peace and development are increasing, and the pressure of developed countries to dominate the economy and science and technology will exist for a long time;

The imbalance of world economic development has intensified, the competition around resources, market, technology and talents has become more intense, trade protectionism has taken on new forms, the strategic plot of hostile forces to westernize and divide China has not changed, and China's economic and social development and security are facing new challenges.

Extended data:

The growth and entrepreneurship period of contemporary college students is an important strategic opportunity period for national development, which provides great opportunities and broad space for college students to display their talents. Students should cherish historical opportunities, consciously link the pursuit of life with the future and destiny of the country and the nation, and create achievements worthy of life in the unremitting struggle for national development and national rejuvenation.

Facing the challenge based on reality. At present, China has made great achievements in socialist modernization, and socialism has shown great vitality in China. At the same time, we should also see that China's development still faces a series of challenges. These challenges are not only challenges to Socialism with Chinese characteristics's career, but also challenges to contemporary college students.