Preserve value. Yi Shisan is the king of brandy. Its aging period is 50 years. It is a cognac-level brandy. The longer it is stored, the more valuable it is, so it maintains its value. Louis XIII is produced by the Remy Martin Company in the Cognac region of Charente Province, France, which has a history of more than 270 years. It is named after the Remy Martin on its trademark.