Your Majesty, This Is Penicillin, Please Use It with Caution

Lin Yan, a doctoral student in medicine in the 21st century, traveled back in time to a young landowner with the same name in the fourth year of Zhenguan in the Tang Dynasty. He wanted to lie down, but because life in the Tang Dynasty was too boring, he tinkered with some distilled liquor. As a result, he accidentally saved the Duke of Yi, Qin Qiong, and opened a new chapter for him in the Tang Dynasty. Let's see if this little butterfly can set off a huge wave...