Abstract ‘Ruifeng Seedless’derived by clonic selection in the offsp ring of‘Pioneer’. It is a late-season purple-red seedless grape which ripens about the third to fourth week of September in Beijing. The clusters are medium in size, and are generally slightly loose. The berries are medium size, averaging 4.93 g, and round. Application of gibberellic acid after berry set has increased the berry size to an average 11.19 g. ‘Ruifeng Seedless’berries are bright, purple-red in color. The flesh is firm. The flavor is sweet, neutral, and good. The quality is best when harvested at 16% soluble solids or higher. ‘Ruifeng Seedless’ is vigorous in growth, high and constant production. Good resistance against some fungal diseases.