It was a 3-year vintage wine (sapphire) collected by Jian Nanchun, which was listed at the end of 26. The collection was actually 1% 3-year vintage wine, but the method of identifying vintage liquor by volatility coefficient was not born at that time, so it was not named after the year. Since the publication of "Identification Method of Volatility Coefficient", the collection of Jian Nanchun has been officially renamed as "3-year collection of Jian Nanchun".