北大三代人守护，这个“穿越千年的微笑”今年终于火出圈

Located in Shanxi province, China, Yungang Grottoes are like a thousand-year-old historical book carved on cliffs and rocks. They witnessed the changes of time and recorded the stories, exchanges, and integrations among people of various ethnic groups. Meet Hang Kan, the esteemed director of the Yungang Research Institute. Discover the enduring romance of archaeology and the story between Hang Kan and the ancient marvel!