Li Sankuai, a newly hired lychee postman, is forced to get involved in the hilarious struggle history in the workplace due to the skyrocketing demand for lychees. By accident, he improved the "wet sand preservation method" spread in the Han Dynasty, using a clay pot + ice-cold cotton wool preservation technique, which unexpectedly extended the shelf life of lychees by half a day. This matter was discovered by Yang Guifei's gluttonous maid, and an unexpected combination of circumstances triggered a "technical revolution in Chang'an express delivery industry." But when he finally stood in front of the imperial concubine to receive the reward, he was so nervous that he blurted out, "Mother, no matter how sweet these lychees are, they can't be as sweet as the smile in your dimples." This caused the whole court to hold back laughter...
