Culture is the spiritual lifeline of a nation. Today, cultural construction has become an important background of Chinese path to modernization. Cross cultural exchanges have entered a new stage. With unique perspectives and actions, young people are trying to build a solid bridge between tradition and modernity, between the local and the world, and become a force for cultural inheritance, innovation and mutual learning of civilizations. The 15th Five Year Plan places cultural prosperity and development at a strategic level, clearly proposing to stimulate the innovation and creativity of the entire nation's culture, and drawing a clear blueprint for cultural construction in the new era. Young people are the driving force of national development and the backbone of cultural heritage, possessing innovative thinking and an international perspective. Nowadays, they have more opportunities and a larger stage to write cultural answers that belong to a generation through deep cultivation of local culture and cross-cultural exchange and mutual learning. Deep cultivation is reflected in the precise capture and in-depth interpretation of cultural details. In the cultural relic restoration room of the Palace Museum, young restorers use microscopes to observe the pigment layers of ancient paintings and use digital technology to record the rust marks of bronze vessels. They not only adhere to the traditional principle of "repairing old as old", but also extend the vitality of cultural heritage through technological means. Across the country, such young people continue to emerge. They are not only restorers of cultural relics, but also decoders of culture, guiding the public to understand the historical context and enjoy cultural feasts. These practices have confirmed a truth: only by truly rooting in the cultural soil can we make inheritance more dynamic and culture more contagious. Vitality is reflected in the expression of cultural exchange. The advantage of young people lies in breaking down cultural barriers through diverse expressions. The key to cross-cultural communication is to enable the core of different civilizations to understand and achieve each other. The vast majority of young people grew up in the Internet era, familiar with the new media communication laws, good at using sympathetic expression instead of rigid preaching, and using life scenes to clear up cultural barriers. This unique communication mode makes cross-cultural communication more penetrating. Innovation cannot be achieved without the flexible use of communication carriers. Young scholars and creators have long broken away from the traditional model of "books+lectures" and opened up new avenues for cultural dissemination on new media platforms. Some young photographers take the "the Belt and Road" as the theme, record the cultural features of different countries with cameras, and show the moment of civilization integration through picture stories and video stories, which is popular online. What is more noteworthy is that the youth group is good at building two-way communication platforms, rather than one-way cultural output. In cross-cultural clubs in universities, Chinese college students and foreign students jointly hold "Mid Autumn Festival Poetry Festival" and "Dragon Boat Festival Rice Dumpling Making" activities, explaining traditional customs through personal participation. This kind of "immersive" communication can bring people closer together than rigid cultural preaching. The future of cultural construction cannot be separated from the responsibility of young people, calling on more people to shoulder the banner of civilization inheritance with a responsible attitude. As an important force in cultural construction, young people should not only become disseminators of culture, but also drivers of cultural innovation and leaders of cultural exchange, standing firm in complex cross-cultural contexts and conveying the voice of China. This responsibility is reflected in the firm protection of cultural stance. In cross-cultural communication, young people should not only maintain an open and inclusive attitude, respect the differences of different civilizations, but also have a clear understanding of the unique value of their own culture, and not blindly follow or cater to others. Faced with the one-sided interpretation of Chinese culture by some foreign media, young people should take the initiative to speak out and restore the original appearance of Chinese culture. For example, in response to the cognitive bias towards Hanfu overseas, young cultural researchers have sorted out the evolution history of clothing and held lectures on Hanfu culture to explain to the world that Hanfu is not only a symbol of clothing, but also a carrier of Chinese aesthetic taste and cultural spirit. This well founded cultural interpretation demonstrates the professional competence and cultural confidence of young scholars. This responsibility is reflected in the conscious integration of personal ideals into the overall situation of the times. The research and practice of youth should always revolve around the strategic needs of national cultural construction and respond to the practical problems of social development. On the front line of rural revitalization, young cultural workers should root themselves at the grassroots level, tap into local cultural resources, help villagers build characteristic cultural brands, and make rural culture the spiritual support of rural revitalization; On the stage of international cultural exchange, young diplomats and scholars should actively build cooperation platforms, promote the normalization of activities such as Sino foreign youth cultural forums and art exhibitions, and make mutual learning of civilizations a bond to enhance national friendship. The cultural identity of young people is never an isolated personal choice, but a value pursuit that resonates with national development and rejuvenation. The inheritance of civilization never stops, and the innovation of culture is endless. Youth possess the most active thinking, full enthusiasm, and broad vision, which are the unique advantages of participating in cultural construction and promoting cross-cultural communication. In the new era, young people do not need to rush for success, but should focus on cultivating cultural roots deeply; Don't pursue grand narratives, but use subtle innovations to convey cultural warmth; Don't be limited to one world, embrace the world with an open attitude. When more young people are engaged in the practice of cultural inheritance and cross-cultural exchanges, tradition and modernity are integrated in innovation, and local culture and world culture coexist in understanding, we will surely make Chinese civilization shine more brightly in the map of world civilization, and inject endless youth power into the cultural prosperity of Chinese path to modernization. (New Society)