- Time-Space Folding: The protagonist, Lin Xiaoman, manages a chain fruit shop in Shenzhen in the 21st century. By chance, she obtains a lychee-wood carving engraved with "Tribute Lychees of Lingnan," triggering the ability to fold time and space. She can travel back and forth between the modern era and Chang'an in the fourteenth year of the Tianbao era (755), but each trip consumes lychee flesh to keep the passage open.
- Historical Setting: The story is set three years before the An Lushan Rebellion. Using modern cold-chain technology, the protagonist improves lychee preservation to meet Yang Guifei's demand for "The Concubine's Smile," while becoming entangled in the power struggle between Yang Guozhong and An Lushan.
