Introduction to balsamic vinegar: Balsamic vinegar of Modena is the most famous local specialty. Different from other vinegars, it is brewed directly from grape juice. The fermentation time is longer and the taste is more mellow and mellow. Balsamic vinegar has a long history, dating back to the Middle Ages. It was originally a delicacy passed down from generation to generation in the private kitchens of local lords. It was neither passed down nor sold to outsiders. It was occasionally used as valuable gifts to send favors to other countries, so it was also called "Duke". Vinegar", "noble vinegar".