Yazhuang was first discovered by the Swiss (later French) Alexander Yersin, who later transformed it into a seaside resort. After graduating from Mabel University in Germany and the Paris Academy of Medical Sciences, Yersin came to Vietnam and fell in love with it. He studied cholera, tetanus and plague all his life and successfully cured a plague patient in the world in 1896. He made an outstanding contribution to the complete control of the plague prevalent in China, Vietnam and Southeast Asia at that time. Yersin also introduced Brazilian rubber tree, Chicken Na tree and excellent breeds of cattle for Vietnamese. Yersin lived in Yazhuang for 50 years to study the bubonic plague and died in Yazhuang on March 1, 1943. After his death, a street in Yazhuang was named after him. A temple was built near his grave, and his former residence was converted into the Yersin Museum. In this small and interesting museum, you can see the offices and libraries that Yersin used at that time. The exhibition includes experimental equipment and an interesting three-dimensional illusion mirror.