[The #1 Bestselling Series in China - Over 10 Million Copies Sold!] Think Night at the Museum meets Spirited Away, set in the world's largest palace. When the tourists leave the Forbidden City, the statues come to life. 10-year-old Li Xiaoyu thought her summer would be boring. But when she finds a mysterious gemstone earring, she accidentally opens a portal to a hidden world right under the nose of Beijing. She discovers that the Forbidden City isn't just a museum—it's a sanctuary for mythical monsters, ancient dragons, and celestial beasts that have nowhere else to go in the modern world. Now, accompanied by a talking cat named Pear Blossom (who demands high-quality canned food), Xiaoyu must solve the mystery of the Cave Light Gem before a dark force destroys the sanctuary forever. Perfect for fans of Percy Jackson, Aru Shah, and studio Ghibli movies.