Camel bells bursting, a show brings Kevin back to ancient Chang'an. It was the starting point of the Silk Road and a place where more than a dozen dynasties flourished. It has witnessed the alternation of dynasties in China and cultural communication. The origin of papermaking also starts here. Making a seemingly simple piece of paper requires countless steps over a long time. The Chinese characters written on the paper have truly witnessed the evolution and change of history, from complex to simple, slow to fast. There are many ways to write a word, full of Chinese thought and wisdom. The atmosphere of calligraphy also spreads to the streets and alleys of the city, waiting for Kevin's exploration and discovery.