What kind of existence is history? We can't restrain our inner curiosity to explore, pursue, recall and think. We have never seen the ocean, so we long for it. We have never seen the Great Wall, so we are looking forward to it. We have never been to space, so we are mysterious and eager to go further, cross the depths of the desert to find a dwelling soul, walk through the footprints of predecessors' treasure hunting and explore the imprint of history.

The Great Wall is the intangible historical and cultural heritage of China, like a long winding dragon entrenched at the foot of the mountain. Countless people with lofty ideals stood on it, vowing to defend their country and go through fire and water.

It witnessed the historical changes in China and conveyed the spirit of perseverance, self-improvement and hard struggle of the people of China. After thousands of years of wind and rain, it still stands and shines with the light of the red sun.

Deep in the desert of northwest China, hungry vultures occasionally forage in the desert of Huangsha Gobi. In such a harsh and remote place, there is a mysterious temple-Dunhuang Mogao Grottoes, which contains a large number of precious murals and books, rich patterns covered in the cave, full of exotic charm.

Inspired by the religious beliefs in the western regions, Dunhuang murals have got rid of the intellectual shackles of traditional ethics in their artistic creation, and the lines, colors and images in the paintings are unrestrained. The early works of Dunhuang murals are mostly painted with red clay lines, which are characterized by dark lines, bold and free and easy, and strong. Early iron line drawing was used to express handsome figures and clothing lines, pure body texture and elegant flying gods.

In the southeast sea, Zheng He's seven voyages to the West created the Maritime Silk Road, which brought cultural shock to countries along the route. China porcelain is also spread locally. As we all know, China porcelain is famous abroad, which not only promotes the economic friendly exchanges between China and other countries, but also lays the foundation for establishing a safe and friendly international environment.

A full moon entrusted many thoughts of returning home from a foreign land and went to Beijing to win fame; Fight to the death with the invaders on the battlefield and serve the country; Defending the national territory in the frontier fortress, we can only look at Leng Yue and pray for our loved ones at home during the festival. How many words are delivered to the door in a thin letter raft, just to see the greetings from those close relatives.

Later, a city, a tree and a home-cooked dish all became the trigger point to touch feelings. Just a look at them, two lines of tears welled up and the blue was wet.

Times have changed, and light and shadow have changed. After thousands of years of historical precipitation, the Great Wall has become a popular tourist attraction and a symbol of strength and perseverance. Dunhuang frescoes are famous at home and abroad, which amazes people all over the world. Zheng He's voyage to the West has also become a famous diplomatic event in history. The imprint of history is clearly reflected in him. Even after a long test, it is indelible. He has gone through a long history, exploring in past stories, pursuing his original intention in the ruins, thinking and enlightening through observation.