Tolerant to cold, but no tolerant to heat. Late bolting. Cylindrical heads are 31cm in length, 20cm in diameter and around 3.5Kg in weight. Dark green outer and yellow inner leaf color. Can be harvested in 65days after transplanting in cool season or 60 days after transplanting in warm season. The temperature must be above 12℃ in the early growth stage, in order to prevent bolting. 33000-38000 plants per hectare.