Abstract：‘Jingchunbai No.2’is a new spring Chinese cabbage F1 hybrid bred by crossing self-incompatible line 92A7 with 9421.It takes about 55-60 days from transplanting to harvest.It is tolerant to inmanturity bolting,and is high resistant to downy mildew,virus disease and black rot.Its characteristics include strong growth vigor，36.9 cm in plant height，53.2 cm in plant spread，green outer leaf，light green petiole and light yellow inner leaf.Its head shape is ovate.Average head weight is about 2.5 kg.Its yield in open field is about 112.5-120.0 t•hm-2.It has been extended to Beijing,Hebei,Shandong,Gansu,Yunnan and Guizhou etc.
