The quality guarantee period is two years. Hongyunlang is a high-end sub-brand in Langjiu. Mr. Lu, the designer of Hongyunlang wine bottle and four ceramic artists in China, said that the color of Hongyunlang wine was inspired by Danxia landform in Chishui River basin, while the sapphire blue of Hongyunlang wine came from Chishui River in late winter, with a shelf life of two years. Shen He, a famous liquor expert, spoke highly of Hongyun Langjiu, which was based on the lifelong blending experience of Mr. Yang Dajin, a national wine critic, and customized according to the requirements of different years.