Xinlan No.1 is a new hybrid of early-maturing and high-quality chestnut pumpkin,with H2016-6-1 as the ma-ternal line and H2016-13-4 as the fraternal line.This variety is early maturing,the fruit development period is about 29 days,and the whole growth period is around 90 days.The plants are vigorous,with dark green leaves.The first female flower appears around the 8 node of the plant.The fruit is flat-round,with dark green skin and slender light green stripes.The flesh is bright yellow,with a thickness of 2.2 cm.It shows strong continuous fruit setting ability,producing 2-3 mel-ons per plant,with rapid fruit expansion.The flesh is sweet and like chestnut,with dry matter content of 21.8%.The aver-age single fruit mass is 2.1 kg,yielding 2300 kg per 667 m2.Lanxin No.1 exhibits resistance to virus disease and good storage and transport qualities.This variety is suitable for early spring cultivation in the open field in Heilongjiang,Jilin,Liaoning,Inner Mongolia,Xinjiang,Shandong,Hebei,Hainan,Hunan and Shanxi provinces.