the key to this question is what are your criteria? If you are in the northeast, it may be "Xianyu 335", Huanghuaihai may be "Zhengdan 958", and if you are in the southwest, it may be "Zhengda 999". Further, if you are in Wuling Mountain area in the southwest, I think the old variety should be "Sanbei No.2" \ "Yun Rui No.4". But if you choose a new substitute, I think "Kang Nong No.3".