‘Weichunbai No.3’ is a new Chinese cabbage F₁ hybrid bred by crossing self-incompatible lines ‘BZ07-09’ as female parent and‘ BD05-272’ as male parent．Its growing period is 68 days．The plant is 36 cm in height and 50 cm in width．The out leaf is dark green in color and petiole is white and thin. The head is of cannonball shape，32 cm in height and 23 cm in diameter．The leaf inside of head is light yellow in color and average single head weight is 1.9 kg．Its net-head rate is 62.9%，soft leaf rate is 41.1% and dwarf stem is 5.2 cm．It can yield about 82.5 t·hm-2．It is resistant to TuMV and medium resistant to downy mildew．It is suitable for cultivation in Shandong，Heibei zhangjiakou，Yunnan and areas around Beijing as spring Chinese cabbage．
Key words：Spring Chinese cabbage；‘Weichunbai No.3’；F₁ hybrid