I'm happy to help you. According to the information you provided, it seems that a female protagonist who traveled back in time to ancient times gave the emperor a bucket of ginger on his birthday. Ginger was an ancient food and one of the important seasonings in Chinese culture. In the novel, the female protagonist gave a bucket of ginger to the emperor to express his respect and blessings to the emperor, and also hoped that he could taste this delicious food. Ginger also had some medicinal value to help digestion, drive away cold, prevent colds, and so on. In the novel, the female protagonist might want to think about the emperor's health by sending ginger. Of course, this is just my guess based on the information you provided. I still need more information from you to confirm the exact plot.